| Message ID | 20240226161414.2316610-5-arnd@kernel.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | arch: mm, vdso: consolidate PAGE_SIZE definition | expand |
Le 26/02/2024 à 17:14, Arnd Bergmann a écrit : > From: Arnd Bergmann <arnd@arndb.de> > > The recent change to the vdso_data_store broke building compat VDSO > on at least arm64 because it includes headers outside of the include/vdso/ > namespace: I understand that powerpc64 also has an issue, see https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20231221120410.2226678-1-mpe@ellerman.id.au/ > > In file included from arch/arm64/include/asm/lse.h:5, > from arch/arm64/include/asm/cmpxchg.h:14, > from arch/arm64/include/asm/atomic.h:16, > from include/linux/atomic.h:7, > from include/asm-generic/bitops/atomic.h:5, > from arch/arm64/include/asm/bitops.h:25, > from include/linux/bitops.h:68, > from arch/arm64/include/asm/memory.h:209, > from arch/arm64/include/asm/page.h:46, > from include/vdso/datapage.h:22, > from lib/vdso/gettimeofday.c:5, > from <command-line>: > arch/arm64/include/asm/atomic_ll_sc.h:298:9: error: unknown type name 'u128' > 298 | u128 full; > > Use an open-coded page size calculation based on the new CONFIG_PAGE_SHIFT > Kconfig symbol instead. > > Reported-by: Linux Kernel Functional Testing <lkft@linaro.org> > Fixes: a0d2fcd62ac2 ("vdso/ARM: Make union vdso_data_store available for all architectures") > Link: https://lore.kernel.org/lkml/CA+G9fYtrXXm_KO9fNPz3XaRxHV7UD_yQp-TEuPQrNRHU+_0W_Q@mail.gmail.com/ > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > include/vdso/datapage.h | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h > index 7ba44379a095..2c39a67d7e23 100644 > --- a/include/vdso/datapage.h > +++ b/include/vdso/datapage.h > @@ -19,8 +19,6 @@ > #include <vdso/time32.h> > #include <vdso/time64.h> > > -#include <asm/page.h> > - > #ifdef CONFIG_ARCH_HAS_VDSO_DATA > #include <asm/vdso/data.h> > #else > @@ -128,7 +126,7 @@ extern struct vdso_data _timens_data[CS_BASES] __attribute__((visibility("hidden > */ > union vdso_data_store { > struct vdso_data data[CS_BASES]; > - u8 page[PAGE_SIZE]; > + u8 page[1ul << CONFIG_PAGE_SHIFT]; Usually 1UL is used (capital letter) Maybe better to (re)define PAGE_SIZE instead, something like: #define PAGE_SIZE (1UL << CONFIG_PAGE_SHIFT) > }; > > /*
Christophe Leroy <christophe.leroy@csgroup.eu> writes: > Le 26/02/2024 à 17:14, Arnd Bergmann a écrit : >> From: Arnd Bergmann <arnd@arndb.de> >> >> The recent change to the vdso_data_store broke building compat VDSO >> on at least arm64 because it includes headers outside of the include/vdso/ >> namespace: > > I understand that powerpc64 also has an issue, see > https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20231221120410.2226678-1-mpe@ellerman.id.au/ Yeah, and that patch would silently conflict with this series, which is not ideal. I could delay merging my patch above until after this series goes in, mine only fixes a fairly obscure build warning. cheers
On Mon, Feb 26, 2024 at 05:14:14PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@arndb.de> > > The recent change to the vdso_data_store broke building compat VDSO > on at least arm64 because it includes headers outside of the include/vdso/ > namespace: > > In file included from arch/arm64/include/asm/lse.h:5, > from arch/arm64/include/asm/cmpxchg.h:14, > from arch/arm64/include/asm/atomic.h:16, > from include/linux/atomic.h:7, > from include/asm-generic/bitops/atomic.h:5, > from arch/arm64/include/asm/bitops.h:25, > from include/linux/bitops.h:68, > from arch/arm64/include/asm/memory.h:209, > from arch/arm64/include/asm/page.h:46, > from include/vdso/datapage.h:22, > from lib/vdso/gettimeofday.c:5, > from <command-line>: > arch/arm64/include/asm/atomic_ll_sc.h:298:9: error: unknown type name 'u128' > 298 | u128 full; > > Use an open-coded page size calculation based on the new CONFIG_PAGE_SHIFT > Kconfig symbol instead. > > Reported-by: Linux Kernel Functional Testing <lkft@linaro.org> > Fixes: a0d2fcd62ac2 ("vdso/ARM: Make union vdso_data_store available for all architectures") > Link: https://lore.kernel.org/lkml/CA+G9fYtrXXm_KO9fNPz3XaRxHV7UD_yQp-TEuPQrNRHU+_0W_Q@mail.gmail.com/ > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h index 7ba44379a095..2c39a67d7e23 100644 --- a/include/vdso/datapage.h +++ b/include/vdso/datapage.h @@ -19,8 +19,6 @@ #include <vdso/time32.h> #include <vdso/time64.h> -#include <asm/page.h> - #ifdef CONFIG_ARCH_HAS_VDSO_DATA #include <asm/vdso/data.h> #else @@ -128,7 +126,7 @@ extern struct vdso_data _timens_data[CS_BASES] __attribute__((visibility("hidden */ union vdso_data_store { struct vdso_data data[CS_BASES]; - u8 page[PAGE_SIZE]; + u8 page[1ul << CONFIG_PAGE_SHIFT]; }; /*