| Message ID | 20220717033453.2896843-3-shorne@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On Sun, Jul 17, 2022 at 12:34:53PM +0900, Stafford Horne wrote: > Two things to note are: > > - isa_dma_bridge_buggy, traditionally this is defined in asm/dma.h but > these architectures avoid creating that file and add the definition > to asm/pci.h. This doesn't have anyting to do with PCI support. I think adding a separate header just for this that always stubs it out unless a config option is set (which x86 then selects) is the besy idea here. I also think the isa_dma_bridge_buggy needs to move out of the PCI code as well.
On Mon, Jul 18, 2022 at 6:37 AM Christoph Hellwig <hch@infradead.org> wrote: > > On Sun, Jul 17, 2022 at 12:34:53PM +0900, Stafford Horne wrote: > > Two things to note are: > > > > - isa_dma_bridge_buggy, traditionally this is defined in asm/dma.h but > > these architectures avoid creating that file and add the definition > > to asm/pci.h. > > This doesn't have anyting to do with PCI support. I think adding a > separate header just for this that always stubs it out unless a config > option is set (which x86 then selects) is the besy idea here. I also > think the isa_dma_bridge_buggy needs to move out of the PCI code as > well. Most architectures have it in asm/dma.h, which is probably the right place (if we end up keeping it), since this is for the ISA DMA API. I would copy this declaration from x86 #ifdef CONFIG_PCI extern int isa_dma_bridge_buggy; #else #define isa_dma_bridge_buggy (0) #endif to asm-generic/dma.h and remove it from arch/sh to avoid the one duplicate definition. The architectures that have the declaration in asm/pci.h (arm64, csky, riscv) already get the asm-generic version of asm/dma.h. As mentioned before, it would be even better to just remove it entirely from everything except x86, and enclose the four references in an explicit "#ifdef X86_32". The variable declaration only exists because drivers/pci/quirks.c is compiled on all architecture, but the individual quirk is only active based on the PCI device ID of certain early PCI-ISA bridges. Arnd
On Tue, Jul 19, 2022 at 1:19 AM Stafford Horne <shorne@gmail.com> wrote: > On Mon, Jul 18, 2022, 3:56 PM Arnd Bergmann <arnd@arndb.de> wrote: >> >> As mentioned before, it would be even better to just remove it >> entirely from everything except x86, and enclose the four >> references in an explicit "#ifdef X86_32". The variable declaration >> only exists because drivers/pci/quirks.c is compiled on all >> architecture, but the individual quirk is only active based on >> the PCI device ID of certain early PCI-ISA bridges. > > > Ok, I was thinking of that route but once I saw the pci device IDs I > wasn't so sure it was limited to x86. I'll go ahead with that approach. Ok, thanks! I checked all the PCI IDs yesterday, and I'm fairly sure they are x86 specific. While some related products are general-purpose PCI-ISA bridges that have shown up on mips or arm boards, the ones listed here should all be safe. Arnd
On Tue, Jul 19, 2022 at 09:45:58AM +0200, Arnd Bergmann wrote: > On Tue, Jul 19, 2022 at 1:19 AM Stafford Horne <shorne@gmail.com> wrote: > > On Mon, Jul 18, 2022, 3:56 PM Arnd Bergmann <arnd@arndb.de> wrote: > >> > >> As mentioned before, it would be even better to just remove it > >> entirely from everything except x86, and enclose the four > >> references in an explicit "#ifdef X86_32". The variable declaration > >> only exists because drivers/pci/quirks.c is compiled on all > >> architecture, but the individual quirk is only active based on > >> the PCI device ID of certain early PCI-ISA bridges. > > > > > > Ok, I was thinking of that route but once I saw the pci device IDs I > > wasn't so sure it was limited to x86. I'll go ahead with that approach. > > Ok, thanks! > > I checked all the PCI IDs yesterday, and I'm fairly sure they are x86 > specific. While some related products are general-purpose PCI-ISA > bridges that have shown up on mips or arm boards, the ones listed > here should all be safe. This is what I have now, I will add a similar patch between 1/2 and 2/2, if this looks ok. It adds a few ifdef's which might be controversial but I think it provides more cleanup than added complexity. I compile tested with x86_64, x86_32 and OpenRISC. diff --git a/arch/alpha/include/asm/dma.h b/arch/alpha/include/asm/dma.h index 28610ea7786d..a04d76b96089 100644 --- a/arch/alpha/include/asm/dma.h +++ b/arch/alpha/include/asm/dma.h @@ -365,13 +365,4 @@ extern void free_dma(unsigned int dmanr); /* release it again */ #define KERNEL_HAVE_CHECK_DMA extern int check_dma(unsigned int dmanr); -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - - #endif /* _ASM_DMA_H */ diff --git a/arch/arc/include/asm/dma.h b/arch/arc/include/asm/dma.h index 5b744f4b10a7..02431027ed2f 100644 --- a/arch/arc/include/asm/dma.h +++ b/arch/arc/include/asm/dma.h @@ -7,10 +7,5 @@ #define ASM_ARC_DMA_H #define MAX_DMA_ADDRESS 0xC0000000 -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy 0 -#endif #endif diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h index a81dda65c576..907d139be431 100644 --- a/arch/arm/include/asm/dma.h +++ b/arch/arm/include/asm/dma.h @@ -143,10 +143,4 @@ extern int get_dma_residue(unsigned int chan); #endif /* CONFIG_ISA_DMA_API */ -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* __ASM_ARM_DMA_H */ diff --git a/arch/ia64/include/asm/dma.h b/arch/ia64/include/asm/dma.h index 59625e9c1f9c..eaed2626ffda 100644 --- a/arch/ia64/include/asm/dma.h +++ b/arch/ia64/include/asm/dma.h @@ -12,8 +12,6 @@ extern unsigned long MAX_DMA_ADDRESS; -extern int isa_dma_bridge_buggy; - #define free_dma(x) #endif /* _ASM_IA64_DMA_H */ diff --git a/arch/m68k/include/asm/dma.h b/arch/m68k/include/asm/dma.h index f6c5e0dfb4e5..1c8d9c5bc2fa 100644 --- a/arch/m68k/include/asm/dma.h +++ b/arch/m68k/include/asm/dma.h @@ -6,10 +6,4 @@ bootmem allocator (but this should do it for this) */ #define MAX_DMA_ADDRESS PAGE_OFFSET -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _M68K_DMA_H */ diff --git a/arch/microblaze/include/asm/dma.h b/arch/microblaze/include/asm/dma.h index f801582be912..7484c9eb66c4 100644 --- a/arch/microblaze/include/asm/dma.h +++ b/arch/microblaze/include/asm/dma.h @@ -9,10 +9,4 @@ /* Virtual address corresponding to last available physical memory address. */ #define MAX_DMA_ADDRESS (CONFIG_KERNEL_START + memory_size - 1) -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_MICROBLAZE_DMA_H */ diff --git a/arch/mips/include/asm/dma.h b/arch/mips/include/asm/dma.h index be726b943530..d6186e6bea7e 100644 --- a/arch/mips/include/asm/dma.h +++ b/arch/mips/include/asm/dma.h @@ -307,12 +307,4 @@ static __inline__ int get_dma_residue(unsigned int dmanr) extern int request_dma(unsigned int dmanr, const char * device_id); /* reserve a DMA channel */ extern void free_dma(unsigned int dmanr); /* release it again */ -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_DMA_H */ diff --git a/arch/parisc/include/asm/dma.h b/arch/parisc/include/asm/dma.h index eea80ed34e6d..9e8c101de902 100644 --- a/arch/parisc/include/asm/dma.h +++ b/arch/parisc/include/asm/dma.h @@ -176,10 +176,4 @@ static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count) #define free_dma(dmanr) -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_DMA_H */ diff --git a/arch/powerpc/include/asm/dma.h b/arch/powerpc/include/asm/dma.h index 6161a9596196..d97c66d9ae34 100644 --- a/arch/powerpc/include/asm/dma.h +++ b/arch/powerpc/include/asm/dma.h @@ -340,11 +340,5 @@ extern int request_dma(unsigned int dmanr, const char *device_id); /* release it again */ extern void free_dma(unsigned int dmanr); -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_DMA_H */ diff --git a/arch/s390/include/asm/dma.h b/arch/s390/include/asm/dma.h index 6f26f35d4a71..dec1c4ce628c 100644 --- a/arch/s390/include/asm/dma.h +++ b/arch/s390/include/asm/dma.h @@ -11,10 +11,4 @@ */ #define MAX_DMA_ADDRESS 0x80000000 -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_S390_DMA_H */ diff --git a/arch/sh/include/asm/dma.h b/arch/sh/include/asm/dma.h index 17d23ae98c77..c8bee3f985a2 100644 --- a/arch/sh/include/asm/dma.h +++ b/arch/sh/include/asm/dma.h @@ -137,10 +137,4 @@ extern int register_chan_caps(const char *dmac, struct dma_chan_caps *capslist); extern int dma_create_sysfs_files(struct dma_channel *, struct dma_info *); extern void dma_remove_sysfs_files(struct dma_channel *, struct dma_info *); -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* __ASM_SH_DMA_H */ diff --git a/arch/sparc/include/asm/dma.h b/arch/sparc/include/asm/dma.h index 462e7c794a09..08043f35b110 100644 --- a/arch/sparc/include/asm/dma.h +++ b/arch/sparc/include/asm/dma.h @@ -82,14 +82,6 @@ #define DMA_BURST64 0x40 #define DMA_BURSTBITS 0x7f -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #ifdef CONFIG_SPARC32 struct device; diff --git a/arch/x86/include/asm/dma.h b/arch/x86/include/asm/dma.h index 8e95aa4b0d17..0c34c658f57d 100644 --- a/arch/x86/include/asm/dma.h +++ b/arch/x86/include/asm/dma.h @@ -309,10 +309,12 @@ extern void free_dma(unsigned int dmanr); /* From PCI */ +#ifdef CONFIG_X86_32 #ifdef CONFIG_PCI extern int isa_dma_bridge_buggy; #else #define isa_dma_bridge_buggy (0) -#endif +#endif /* CONFIG_PCI */ +#endif /* CONFIG_X86_32 */ #endif /* _ASM_X86_DMA_H */ diff --git a/arch/xtensa/include/asm/dma.h b/arch/xtensa/include/asm/dma.h index bb099a373b5a..172644539032 100644 --- a/arch/xtensa/include/asm/dma.h +++ b/arch/xtensa/include/asm/dma.h @@ -52,11 +52,4 @@ extern int request_dma(unsigned int dmanr, const char * device_id); extern void free_dma(unsigned int dmanr); -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - - #endif diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c index 700982464c53..508421809128 100644 --- a/drivers/comedi/drivers/comedi_isadma.c +++ b/drivers/comedi/drivers/comedi_isadma.c @@ -104,8 +104,10 @@ unsigned int comedi_isadma_poll(struct comedi_isadma *dma) flags = claim_dma_lock(); clear_dma_ff(desc->chan); +#ifdef CONFIG_X86_32 if (!isa_dma_bridge_buggy) disable_dma(desc->chan); +#endif result = get_dma_residue(desc->chan); /* * Read the counter again and choose higher value in order to @@ -113,8 +115,10 @@ unsigned int comedi_isadma_poll(struct comedi_isadma *dma) * isa_dma_bridge_buggy is set. */ result1 = get_dma_residue(desc->chan); +#ifdef CONFIG_X86_32 if (!isa_dma_bridge_buggy) enable_dma(desc->chan); +#endif release_dma_lock(flags); if (result < result1) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index cfaf40a540a8..60c55d2cb2cc 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -41,8 +41,10 @@ const char *pci_power_names[] = { }; EXPORT_SYMBOL_GPL(pci_power_names); +#ifdef CONFIG_X86_32 int isa_dma_bridge_buggy; EXPORT_SYMBOL(isa_dma_bridge_buggy); +#endif int pci_pci_problems; EXPORT_SYMBOL(pci_pci_problems); diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 41aeaa235132..cb7715a0f339 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -239,6 +239,7 @@ static void quirk_passive_release(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release); DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release); +#ifdef CONFIG_X86_32 /* * The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a * workaround but VIA don't answer queries. If you happen to have good @@ -265,6 +266,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, quirk_isa_dma DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_1, quirk_isa_dma_hangs); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_dma_hangs); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs); +#endif /* * Intel NM10 "TigerPoint" LPC PM1a_STS.BM_STS must be clear diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h index 556147983911..3ceb0cb12321 100644 --- a/include/asm-generic/pci.h +++ b/include/asm-generic/pci.h @@ -18,8 +18,6 @@ #define pcibios_assign_all_busses() 1 #endif -extern int isa_dma_bridge_buggy; - /* Enable generic resource mapping code in drivers/pci/ */ #define ARCH_GENERIC_PCI_MMAP_RESOURCE diff --git a/sound/core/isadma.c b/sound/core/isadma.c index 1f45ede023b4..8a6397109c56 100644 --- a/sound/core/isadma.c +++ b/sound/core/isadma.c @@ -73,8 +73,10 @@ unsigned int snd_dma_pointer(unsigned long dma, unsigned int size) flags = claim_dma_lock(); clear_dma_ff(dma); +#ifdef CONFIG_X86_32 if (!isa_dma_bridge_buggy) disable_dma(dma); +#endif result = get_dma_residue(dma); /* * HACK - read the counter again and choose higher value in order to @@ -82,8 +84,10 @@ unsigned int snd_dma_pointer(unsigned long dma, unsigned int size) * isa_dma_bridge_buggy is set. */ result1 = get_dma_residue(dma); +#ifdef CONFIG_X86_32 if (!isa_dma_bridge_buggy) enable_dma(dma); +#endif release_dma_lock(flags); if (unlikely(result < result1)) result = result1;
On Tue, Jul 19, 2022 at 12:55 PM Stafford Horne <shorne@gmail.com> wrote: > diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c > index 700982464c53..508421809128 100644 > --- a/drivers/comedi/drivers/comedi_isadma.c > +++ b/drivers/comedi/drivers/comedi_isadma.c > @@ -104,8 +104,10 @@ unsigned int comedi_isadma_poll(struct comedi_isadma *dma) > > flags = claim_dma_lock(); > clear_dma_ff(desc->chan); > +#ifdef CONFIG_X86_32 > if (!isa_dma_bridge_buggy) > disable_dma(desc->chan); > +#endif There is a logic mistake here: if we are on something other than x86-32, this always needs to call the disable_dma()/enable_dma(). Not sure how to best express this in a readable way, something like this would work: #ifdef CONFIG_X86_32 if (!isa_dma_bridge_buggy) #endif disable_dma(desc->chan); or possibly at the start of this file, a #ifndef CONFIG_X86_32 #define isa_dma_bridge_buggy 0 #endif Or we could try to keep the generic definition in a global header like linux/isa-dma.h. > --- a/sound/core/isadma.c > +++ b/sound/core/isadma.c > @@ -73,8 +73,10 @@ unsigned int snd_dma_pointer(unsigned long dma, unsigned int size) > > flags = claim_dma_lock(); > clear_dma_ff(dma); > +#ifdef CONFIG_X86_32 > if (!isa_dma_bridge_buggy) > disable_dma(dma); > +#endif > result = get_dma_residue(dma); > /* Same here. Arnd
On Tue, Jul 19, 2022 at 01:55:03PM +0200, Arnd Bergmann wrote: > On Tue, Jul 19, 2022 at 12:55 PM Stafford Horne <shorne@gmail.com> wrote: > > > diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c > > index 700982464c53..508421809128 100644 > > --- a/drivers/comedi/drivers/comedi_isadma.c > > +++ b/drivers/comedi/drivers/comedi_isadma.c > > @@ -104,8 +104,10 @@ unsigned int comedi_isadma_poll(struct comedi_isadma *dma) > > > > flags = claim_dma_lock(); > > clear_dma_ff(desc->chan); > > +#ifdef CONFIG_X86_32 > > if (!isa_dma_bridge_buggy) > > disable_dma(desc->chan); > > +#endif > > There is a logic mistake here: if we are on something other than x86-32, > this always needs to call the disable_dma()/enable_dma(). Oops, thats right. Sorry, I should have noticed that. > Not sure how to best express this in a readable way, something like this > would work: Option 1: > #ifdef CONFIG_X86_32 > if (!isa_dma_bridge_buggy) > #endif > disable_dma(desc->chan); > > > or possibly at the start of this file, a Option 2: > #ifndef CONFIG_X86_32 > #define isa_dma_bridge_buggy 0 > #endif Option 3: > Or we could try to keep the generic definition in a global header > like linux/isa-dma.h. Perhaps option 3 makes the whole patch the most clean. -Stafford
On Tue, Jul 19, 2022 at 09:23:36PM +0900, Stafford Horne wrote: > On Tue, Jul 19, 2022 at 01:55:03PM +0200, Arnd Bergmann wrote: > > On Tue, Jul 19, 2022 at 12:55 PM Stafford Horne <shorne@gmail.com> wrote: > > > > > diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c > > > index 700982464c53..508421809128 100644 > > > --- a/drivers/comedi/drivers/comedi_isadma.c > > > +++ b/drivers/comedi/drivers/comedi_isadma.c > > > @@ -104,8 +104,10 @@ unsigned int comedi_isadma_poll(struct comedi_isadma *dma) > > > > > > flags = claim_dma_lock(); > > > clear_dma_ff(desc->chan); > > > +#ifdef CONFIG_X86_32 > > > if (!isa_dma_bridge_buggy) > > > disable_dma(desc->chan); > > > +#endif > > > > There is a logic mistake here: if we are on something other than x86-32, > > this always needs to call the disable_dma()/enable_dma(). > > Oops, thats right. Sorry, I should have noticed that. > > > Not sure how to best express this in a readable way, something like this > > would work: > > Option 1: > > > #ifdef CONFIG_X86_32 > > if (!isa_dma_bridge_buggy) > > #endif > > disable_dma(desc->chan); > > > > > > or possibly at the start of this file, a > > Option 2: > > > #ifndef CONFIG_X86_32 > > #define isa_dma_bridge_buggy 0 > > #endif > > Option 3: > > > Or we could try to keep the generic definition in a global header > > like linux/isa-dma.h. > > Perhaps option 3 makes the whole patch the most clean. And this is the result, I will get this into the series and create a v4 tomorrow if no issues. -Stafford -- diff --git a/arch/alpha/include/asm/dma.h b/arch/alpha/include/asm/dma.h index 28610ea7786d..a04d76b96089 100644 --- a/arch/alpha/include/asm/dma.h +++ b/arch/alpha/include/asm/dma.h @@ -365,13 +365,4 @@ extern void free_dma(unsigned int dmanr); /* release it again */ #define KERNEL_HAVE_CHECK_DMA extern int check_dma(unsigned int dmanr); -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - - #endif /* _ASM_DMA_H */ diff --git a/arch/arc/include/asm/dma.h b/arch/arc/include/asm/dma.h index 5b744f4b10a7..02431027ed2f 100644 --- a/arch/arc/include/asm/dma.h +++ b/arch/arc/include/asm/dma.h @@ -7,10 +7,5 @@ #define ASM_ARC_DMA_H #define MAX_DMA_ADDRESS 0xC0000000 -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy 0 -#endif #endif diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h index a81dda65c576..907d139be431 100644 --- a/arch/arm/include/asm/dma.h +++ b/arch/arm/include/asm/dma.h @@ -143,10 +143,4 @@ extern int get_dma_residue(unsigned int chan); #endif /* CONFIG_ISA_DMA_API */ -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* __ASM_ARM_DMA_H */ diff --git a/arch/ia64/include/asm/dma.h b/arch/ia64/include/asm/dma.h index 59625e9c1f9c..eaed2626ffda 100644 --- a/arch/ia64/include/asm/dma.h +++ b/arch/ia64/include/asm/dma.h @@ -12,8 +12,6 @@ extern unsigned long MAX_DMA_ADDRESS; -extern int isa_dma_bridge_buggy; - #define free_dma(x) #endif /* _ASM_IA64_DMA_H */ diff --git a/arch/m68k/include/asm/dma.h b/arch/m68k/include/asm/dma.h index f6c5e0dfb4e5..1c8d9c5bc2fa 100644 --- a/arch/m68k/include/asm/dma.h +++ b/arch/m68k/include/asm/dma.h @@ -6,10 +6,4 @@ bootmem allocator (but this should do it for this) */ #define MAX_DMA_ADDRESS PAGE_OFFSET -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _M68K_DMA_H */ diff --git a/arch/microblaze/include/asm/dma.h b/arch/microblaze/include/asm/dma.h index f801582be912..7484c9eb66c4 100644 --- a/arch/microblaze/include/asm/dma.h +++ b/arch/microblaze/include/asm/dma.h @@ -9,10 +9,4 @@ /* Virtual address corresponding to last available physical memory address. */ #define MAX_DMA_ADDRESS (CONFIG_KERNEL_START + memory_size - 1) -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_MICROBLAZE_DMA_H */ diff --git a/arch/mips/include/asm/dma.h b/arch/mips/include/asm/dma.h index be726b943530..d6186e6bea7e 100644 --- a/arch/mips/include/asm/dma.h +++ b/arch/mips/include/asm/dma.h @@ -307,12 +307,4 @@ static __inline__ int get_dma_residue(unsigned int dmanr) extern int request_dma(unsigned int dmanr, const char * device_id); /* reserve a DMA channel */ extern void free_dma(unsigned int dmanr); /* release it again */ -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_DMA_H */ diff --git a/arch/parisc/include/asm/dma.h b/arch/parisc/include/asm/dma.h index eea80ed34e6d..9e8c101de902 100644 --- a/arch/parisc/include/asm/dma.h +++ b/arch/parisc/include/asm/dma.h @@ -176,10 +176,4 @@ static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count) #define free_dma(dmanr) -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_DMA_H */ diff --git a/arch/powerpc/include/asm/dma.h b/arch/powerpc/include/asm/dma.h index 6161a9596196..d97c66d9ae34 100644 --- a/arch/powerpc/include/asm/dma.h +++ b/arch/powerpc/include/asm/dma.h @@ -340,11 +340,5 @@ extern int request_dma(unsigned int dmanr, const char *device_id); /* release it again */ extern void free_dma(unsigned int dmanr); -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_DMA_H */ diff --git a/arch/s390/include/asm/dma.h b/arch/s390/include/asm/dma.h index 6f26f35d4a71..dec1c4ce628c 100644 --- a/arch/s390/include/asm/dma.h +++ b/arch/s390/include/asm/dma.h @@ -11,10 +11,4 @@ */ #define MAX_DMA_ADDRESS 0x80000000 -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_S390_DMA_H */ diff --git a/arch/sh/include/asm/dma.h b/arch/sh/include/asm/dma.h index 17d23ae98c77..c8bee3f985a2 100644 --- a/arch/sh/include/asm/dma.h +++ b/arch/sh/include/asm/dma.h @@ -137,10 +137,4 @@ extern int register_chan_caps(const char *dmac, struct dma_chan_caps *capslist); extern int dma_create_sysfs_files(struct dma_channel *, struct dma_info *); extern void dma_remove_sysfs_files(struct dma_channel *, struct dma_info *); -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* __ASM_SH_DMA_H */ diff --git a/arch/sparc/include/asm/dma.h b/arch/sparc/include/asm/dma.h index 462e7c794a09..08043f35b110 100644 --- a/arch/sparc/include/asm/dma.h +++ b/arch/sparc/include/asm/dma.h @@ -82,14 +82,6 @@ #define DMA_BURST64 0x40 #define DMA_BURSTBITS 0x7f -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #ifdef CONFIG_SPARC32 struct device; diff --git a/arch/x86/include/asm/dma.h b/arch/x86/include/asm/dma.h index 8e95aa4b0d17..8ae6e0e11b8b 100644 --- a/arch/x86/include/asm/dma.h +++ b/arch/x86/include/asm/dma.h @@ -307,12 +307,4 @@ extern int request_dma(unsigned int dmanr, const char *device_id); extern void free_dma(unsigned int dmanr); #endif -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_X86_DMA_H */ diff --git a/arch/xtensa/include/asm/dma.h b/arch/xtensa/include/asm/dma.h index bb099a373b5a..172644539032 100644 --- a/arch/xtensa/include/asm/dma.h +++ b/arch/xtensa/include/asm/dma.h @@ -52,11 +52,4 @@ extern int request_dma(unsigned int dmanr, const char * device_id); extern void free_dma(unsigned int dmanr); -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - - #endif diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c index 700982464c53..1d470b0da34c 100644 --- a/drivers/comedi/drivers/comedi_isadma.c +++ b/drivers/comedi/drivers/comedi_isadma.c @@ -8,6 +8,7 @@ #include <linux/slab.h> #include <linux/delay.h> #include <linux/dma-mapping.h> +#include <linux/isa-dma.h> #include <asm/dma.h> #include <linux/comedi/comedidev.h> #include <linux/comedi/comedi_isadma.h> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index cfaf40a540a8..60c55d2cb2cc 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -41,8 +41,10 @@ const char *pci_power_names[] = { }; EXPORT_SYMBOL_GPL(pci_power_names); +#ifdef CONFIG_X86_32 int isa_dma_bridge_buggy; EXPORT_SYMBOL(isa_dma_bridge_buggy); +#endif int pci_pci_problems; EXPORT_SYMBOL(pci_pci_problems); diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 41aeaa235132..6fc64509eee7 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -17,6 +17,7 @@ #include <linux/kernel.h> #include <linux/export.h> #include <linux/pci.h> +#include <linux/isa-dma.h> /* isa_dma_bridge_buggy */ #include <linux/init.h> #include <linux/delay.h> #include <linux/acpi.h> @@ -30,7 +31,6 @@ #include <linux/pm_runtime.h> #include <linux/suspend.h> #include <linux/switchtec.h> -#include <asm/dma.h> /* isa_dma_bridge_buggy */ #include "pci.h" static ktime_t fixup_debug_start(struct pci_dev *dev, @@ -239,6 +239,7 @@ static void quirk_passive_release(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release); DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release); +#ifdef CONFIG_X86_32 /* * The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a * workaround but VIA don't answer queries. If you happen to have good @@ -265,6 +266,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, quirk_isa_dma DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_1, quirk_isa_dma_hangs); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_dma_hangs); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs); +#endif /* * Intel NM10 "TigerPoint" LPC PM1a_STS.BM_STS must be clear diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h index 556147983911..3ceb0cb12321 100644 --- a/include/asm-generic/pci.h +++ b/include/asm-generic/pci.h @@ -18,8 +18,6 @@ #define pcibios_assign_all_busses() 1 #endif -extern int isa_dma_bridge_buggy; - /* Enable generic resource mapping code in drivers/pci/ */ #define ARCH_GENERIC_PCI_MMAP_RESOURCE diff --git a/include/linux/isa-dma.h b/include/linux/isa-dma.h new file mode 100644 index 000000000000..9514f0949fa1 --- /dev/null +++ b/include/linux/isa-dma.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __LINUX_ISA_DMA_H +#define __LINUX_ISA_DMA_H + +#if defined(CONFIG_PCI) && defined(CONFIG_X86_32) +extern int isa_dma_bridge_buggy; +#else +#define isa_dma_bridge_buggy (0) +#endif + +#endif /* __LINUX_ISA_DMA_H */ diff --git a/sound/core/isadma.c b/sound/core/isadma.c index 1f45ede023b4..9516cfb3d237 100644 --- a/sound/core/isadma.c +++ b/sound/core/isadma.c @@ -12,6 +12,7 @@ #undef HAVE_REALLY_SLOW_DMA_CONTROLLER #include <linux/export.h> +#include <linux/isa-dma.h> #include <sound/core.h> #include <asm/dma.h>
On Tue, Jul 19, 2022 at 3:05 PM Stafford Horne <shorne@gmail.com> wrote: > On Tue, Jul 19, 2022 at 09:23:36PM +0900, Stafford Horne wrote: > > On Tue, Jul 19, 2022 at 01:55:03PM +0200, Arnd Bergmann wrote: > > And this is the result, I will get this into the series and create a v4 tomorrow > if no issues. Looks good to me, just one detail: > diff --git a/include/linux/isa-dma.h b/include/linux/isa-dma.h > new file mode 100644 > index 000000000000..9514f0949fa1 > --- /dev/null > +++ b/include/linux/isa-dma.h > @@ -0,0 +1,12 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > + > +#ifndef __LINUX_ISA_DMA_H > +#define __LINUX_ISA_DMA_H > + > +#if defined(CONFIG_PCI) && defined(CONFIG_X86_32) > +extern int isa_dma_bridge_buggy; > +#else > +#define isa_dma_bridge_buggy (0) > +#endif > + > +#endif /* __LINUX_ISA_DMA_H */ I would make this file #include <asm/dma.h> as a step towards making linux/isa-dma.h the official replacement for it in the driver api. Including asm/dma.h from a driver is already a bit awkward, since we are generally moving towards including only linux/*.h type headers, and the dma.h name is too generic for something that is completely obsolete. Arnd
On Tue, Jul 19, 2022 at 03:18:17PM +0200, Arnd Bergmann wrote: > On Tue, Jul 19, 2022 at 3:05 PM Stafford Horne <shorne@gmail.com> wrote: > > On Tue, Jul 19, 2022 at 09:23:36PM +0900, Stafford Horne wrote: > > > On Tue, Jul 19, 2022 at 01:55:03PM +0200, Arnd Bergmann wrote: > > > > > And this is the result, I will get this into the series and create a v4 tomorrow > > if no issues. > > Looks good to me, just one detail: > > > diff --git a/include/linux/isa-dma.h b/include/linux/isa-dma.h > > new file mode 100644 > > index 000000000000..9514f0949fa1 > > --- /dev/null > > +++ b/include/linux/isa-dma.h > > @@ -0,0 +1,12 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > + > > +#ifndef __LINUX_ISA_DMA_H > > +#define __LINUX_ISA_DMA_H > > + > > +#if defined(CONFIG_PCI) && defined(CONFIG_X86_32) > > +extern int isa_dma_bridge_buggy; > > +#else > > +#define isa_dma_bridge_buggy (0) > > +#endif > > + > > +#endif /* __LINUX_ISA_DMA_H */ > > I would make this file #include <asm/dma.h> as a step towards making > linux/isa-dma.h the official replacement for it in the driver api. > > Including asm/dma.h from a driver is already a bit awkward, since we > are generally moving towards including only linux/*.h type headers, and > the dma.h name is too generic for something that is completely obsolete. OK, that makes sense. Then I can remove the asm/dma.h include from: - drivers/comedi/drivers/comedi_isadma.c - sound/core/isadma.c -Stafford
On Tue, Jul 19, 2022 at 10:05:46PM +0900, Stafford Horne wrote: > > > Or we could try to keep the generic definition in a global header > > > like linux/isa-dma.h. > > > > Perhaps option 3 makes the whole patch the most clean. > > And this is the result, I will get this into the series and create a v4 tomorrow > if no issues. Yes, this is what I tried to suggest earlier and it looks fine to me. If we want to overengineer it we could add a ISA_DMA_BRIDGE_BUGGY Kconfig symbol and select it from x86.
From: Stafford Horne > Sent: 19 July 2022 13:24 > > On Tue, Jul 19, 2022 at 01:55:03PM +0200, Arnd Bergmann wrote: > > On Tue, Jul 19, 2022 at 12:55 PM Stafford Horne <shorne@gmail.com> wrote: > > > > > diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c > > > index 700982464c53..508421809128 100644 > > > --- a/drivers/comedi/drivers/comedi_isadma.c > > > +++ b/drivers/comedi/drivers/comedi_isadma.c > > > @@ -104,8 +104,10 @@ unsigned int comedi_isadma_poll(struct comedi_isadma *dma) > > > > > > flags = claim_dma_lock(); > > > clear_dma_ff(desc->chan); > > > +#ifdef CONFIG_X86_32 > > > if (!isa_dma_bridge_buggy) > > > disable_dma(desc->chan); > > > +#endif > > > > There is a logic mistake here: if we are on something other than x86-32, > > this always needs to call the disable_dma()/enable_dma(). > > Oops, thats right. Sorry, I should have noticed that. > > > Not sure how to best express this in a readable way, something like this > > would work: > > Option 1: > > > #ifdef CONFIG_X86_32 > > if (!isa_dma_bridge_buggy) > > #endif > > disable_dma(desc->chan); > > > > > > or possibly at the start of this file, a > > Option 2: > > > #ifndef CONFIG_X86_32 > > #define isa_dma_bridge_buggy 0 > > #endif > > Option 3: > > > Or we could try to keep the generic definition in a global header > > like linux/isa-dma.h. > > Perhaps option 3 makes the whole patch the most clean. Isn't there a define that can be used inside an if? So you could do: if (!IS_CONFIG_X86_32 || !isa_dma_bridge_buggy) disable_dma(); (but I can't remember the name!) David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
On Tue, Jul 19, 2022 at 07:32:46AM -0700, Christoph Hellwig wrote: > On Tue, Jul 19, 2022 at 10:05:46PM +0900, Stafford Horne wrote: > > > > Or we could try to keep the generic definition in a global header > > > > like linux/isa-dma.h. > > > > > > Perhaps option 3 makes the whole patch the most clean. > > > > And this is the result, I will get this into the series and create a v4 tomorrow > > if no issues. > > Yes, this is what I tried to suggest earlier and it looks fine to me. > If we want to overengineer it we could add a ISA_DMA_BRIDGE_BUGGY > Kconfig symbol and select it from x86. I left it as X86_32, I feel it it would be more confusing/hard to maintain to add the extra level of indirection. -Stafford
On Tue, Jul 19, 2022 at 03:09:35PM +0000, David Laight wrote: > From: Stafford Horne > > Sent: 19 July 2022 13:24 > > > > On Tue, Jul 19, 2022 at 01:55:03PM +0200, Arnd Bergmann wrote: > > > On Tue, Jul 19, 2022 at 12:55 PM Stafford Horne <shorne@gmail.com> wrote: > > Option 3: > > > > > Or we could try to keep the generic definition in a global header > > > like linux/isa-dma.h. > > > > Perhaps option 3 makes the whole patch the most clean. > > Isn't there a define that can be used inside an if? > So you could do: > if (!IS_CONFIG_X86_32 || !isa_dma_bridge_buggy) > disable_dma(); > (but I can't remember the name!) I think you probably mean: if (IS_ENABLED(CONFIG_X86_32) ... ) That could work too, but we still want to move the definition of isa_dma_bridge_buggy out of architectures and into the global header. I have gone with option 3 for now. -Stafford
diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h index b33ca260e3c9..1180e83712f5 100644 --- a/arch/arm64/include/asm/pci.h +++ b/arch/arm64/include/asm/pci.h @@ -9,7 +9,6 @@ #include <asm/io.h> #define PCIBIOS_MIN_IO 0x1000 -#define PCIBIOS_MIN_MEM 0 /* * Set to 1 if the kernel should re-assign all PCI bus numbers @@ -18,9 +17,6 @@ (pci_has_flag(PCI_REASSIGN_ALL_BUS)) #define arch_can_pci_mmap_wc() 1 -#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1 - -extern int isa_dma_bridge_buggy; #ifdef CONFIG_PCI static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) @@ -28,11 +24,9 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) /* no legacy IRQ on arm64 */ return -ENODEV; } - -static inline int pci_proc_domain(struct pci_bus *bus) -{ - return 1; -} #endif /* CONFIG_PCI */ +/* Generic PCI */ +#include <asm-generic/pci.h> + #endif /* __ASM_PCI_H */ diff --git a/arch/csky/include/asm/pci.h b/arch/csky/include/asm/pci.h index ebc765b1f78b..44866c1ad461 100644 --- a/arch/csky/include/asm/pci.h +++ b/arch/csky/include/asm/pci.h @@ -9,26 +9,10 @@ #include <asm/io.h> -#define PCIBIOS_MIN_IO 0 -#define PCIBIOS_MIN_MEM 0 +/* Generic PCI */ +#include <asm-generic/pci.h> -/* C-SKY shim does not initialize PCI bus */ -#define pcibios_assign_all_busses() 1 - -extern int isa_dma_bridge_buggy; - -#ifdef CONFIG_PCI -static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) -{ - /* no legacy IRQ on csky */ - return -ENODEV; -} - -static inline int pci_proc_domain(struct pci_bus *bus) -{ - /* always show the domain in /proc */ - return 1; -} -#endif /* CONFIG_PCI */ +/* csky doesn't use generic pci resource mapping */ +#undef ARCH_GENERIC_PCI_MMAP_RESOURCE #endif /* __ASM_CSKY_PCI_H */ diff --git a/arch/riscv/include/asm/pci.h b/arch/riscv/include/asm/pci.h index 7fd52a30e605..12ce8150cfb0 100644 --- a/arch/riscv/include/asm/pci.h +++ b/arch/riscv/include/asm/pci.h @@ -12,29 +12,7 @@ #include <asm/io.h> -#define PCIBIOS_MIN_IO 0 -#define PCIBIOS_MIN_MEM 0 - -/* RISC-V shim does not initialize PCI bus */ -#define pcibios_assign_all_busses() 1 - -#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1 - -extern int isa_dma_bridge_buggy; - #ifdef CONFIG_PCI -static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) -{ - /* no legacy IRQ on risc-v */ - return -ENODEV; -} - -static inline int pci_proc_domain(struct pci_bus *bus) -{ - /* always show the domain in /proc */ - return 1; -} - #ifdef CONFIG_NUMA static inline int pcibus_to_node(struct pci_bus *bus) @@ -50,4 +28,7 @@ static inline int pcibus_to_node(struct pci_bus *bus) #endif /* CONFIG_PCI */ +/* Generic PCI */ +#include <asm-generic/pci.h> + #endif /* _ASM_RISCV_PCI_H */ diff --git a/arch/um/include/asm/pci.h b/arch/um/include/asm/pci.h index da13fd5519ef..34fe4921b5fa 100644 --- a/arch/um/include/asm/pci.h +++ b/arch/um/include/asm/pci.h @@ -4,28 +4,8 @@ #include <linux/types.h> #include <asm/io.h> -#define PCIBIOS_MIN_IO 0 -#define PCIBIOS_MIN_MEM 0 - -#define pcibios_assign_all_busses() 1 - -extern int isa_dma_bridge_buggy; - -#ifdef CONFIG_PCI -static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) -{ - /* no legacy IRQs */ - return -ENODEV; -} -#endif - -#ifdef CONFIG_PCI_DOMAINS -static inline int pci_proc_domain(struct pci_bus *bus) -{ - /* always show the domain in /proc */ - return 1; -} -#endif /* CONFIG_PCI */ +/* Generic PCI */ +#include <asm-generic/pci.h> #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN /* diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h new file mode 100644 index 000000000000..fbc25741696a --- /dev/null +++ b/include/asm-generic/pci.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_GENERIC_PCI_H +#define __ASM_GENERIC_PCI_H + +#include <linux/types.h> + +#ifndef PCIBIOS_MIN_IO +#define PCIBIOS_MIN_IO 0 +#endif + +#ifndef PCIBIOS_MIN_MEM +#define PCIBIOS_MIN_MEM 0 +#endif + +#ifndef pcibios_assign_all_busses +/* For bootloaders that do not initialize the PCI bus */ +#define pcibios_assign_all_busses() 1 +#endif + +extern int isa_dma_bridge_buggy; + +/* Enable generic resource mapping code in drivers/pci/ */ +#define ARCH_GENERIC_PCI_MMAP_RESOURCE + +#ifdef CONFIG_PCI + +static inline int pci_proc_domain(struct pci_bus *bus) +{ + /* always show the domain in /proc */ + return 1; +} + +#endif /* CONFIG_PCI */ + +#endif /* __ASM_GENERIC_PCI_H */
The asm/pci.h used for many newer architectures share similar definitions. Move the common parts to asm-generic/pci.h to allow for sharing code. Two things to note are: - isa_dma_bridge_buggy, traditionally this is defined in asm/dma.h but these architectures avoid creating that file and add the definition to asm/pci.h. - ARCH_GENERIC_PCI_MMAP_RESOURCE, csky does not define this so we undefine it after including asm-generic/pci.h. Why doesn't csky define it? - pci_get_legacy_ide_irq, This function is only used on architectures that support PNP. It is only maintained for arm64, in other architectures it is removed. Suggested-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/lkml/CAK8P3a0JmPeczfmMBE__vn=Jbvf=nkbpVaZCycyv40pZNCJJXQ@mail.gmail.com/ Signed-off-by: Stafford Horne <shorne@gmail.com> --- arch/arm64/include/asm/pci.h | 12 +++--------- arch/csky/include/asm/pci.h | 24 ++++-------------------- arch/riscv/include/asm/pci.h | 25 +++---------------------- arch/um/include/asm/pci.h | 24 ++---------------------- include/asm-generic/pci.h | 36 ++++++++++++++++++++++++++++++++++++ 5 files changed, 48 insertions(+), 73 deletions(-) create mode 100644 include/asm-generic/pci.h