| Message ID | 1531728024-13259-1-git-send-email-rppt@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
> -----Original Messages----- > From: "Mike Rapoport" <rppt@linux.vnet.ibm.com> > Sent Time: 2018-07-16 16:00:24 (Monday) > To: "Guan Xuetao" <gxt@pku.edu.cn> > Cc: "Michal Hocko" <mhocko@kernel.org>, "Arnd Bergmann" <arnd@arndb.de>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Mike Rapoport" <rppt@linux.vnet.ibm.com> > Subject: [PATCH] unicore32: switch to NO_BOOTMEM > > The unicore32 already supports memblock and uses it for some early memory > reservations, e.g initrd and the page tables. > > At some point unicore32 allocates the bootmem bitmap from the memblock and > then hands over the memory reservations from memblock to bootmem. > > This patch removes the bootmem initialization and leaves memblock as the > only boot time memory manager for unicore32. > > Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Seems ok to unicore32. Thanks. Acked-by: Guan Xuetao <gxt@pku.edu.cn> > --- > > I couldn't get unicore32 toolchain as the only link I was able to find [1] > gives me timeout, so the best I could do to check the changes was > > gcc <lots of flags> -c arch/unicore32/mm/init.c > > [1] http://mprc.pku.edu.cn/~guanxuetao/linux/uc4-1.0.5-hard.tgz > > arch/unicore32/Kconfig | 1 + > arch/unicore32/mm/init.c | 54 +----------------------------------------------- > 2 files changed, 2 insertions(+), 53 deletions(-) > > diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig > index 03f991e..cff4b9d 100644 > --- a/arch/unicore32/Kconfig > +++ b/arch/unicore32/Kconfig > @@ -5,6 +5,7 @@ config UNICORE32 > select ARCH_MIGHT_HAVE_PC_PARPORT > select ARCH_MIGHT_HAVE_PC_SERIO > select HAVE_MEMBLOCK > + select NO_BOOTMEM > select HAVE_GENERIC_DMA_COHERENT > select HAVE_KERNEL_GZIP > select HAVE_KERNEL_BZIP2 > diff --git a/arch/unicore32/mm/init.c b/arch/unicore32/mm/init.c > index f4950fb..44ccc15 100644 > --- a/arch/unicore32/mm/init.c > +++ b/arch/unicore32/mm/init.c > @@ -84,58 +84,6 @@ static void __init find_limits(unsigned long *min, unsigned long *max_low, > } > } > > -static void __init uc32_bootmem_init(unsigned long start_pfn, > - unsigned long end_pfn) > -{ > - struct memblock_region *reg; > - unsigned int boot_pages; > - phys_addr_t bitmap; > - pg_data_t *pgdat; > - > - /* > - * Allocate the bootmem bitmap page. This must be in a region > - * of memory which has already been mapped. > - */ > - boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); > - bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES, > - __pfn_to_phys(end_pfn)); > - > - /* > - * Initialise the bootmem allocator, handing the > - * memory banks over to bootmem. > - */ > - node_set_online(0); > - pgdat = NODE_DATA(0); > - init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn); > - > - /* Free the lowmem regions from memblock into bootmem. */ > - for_each_memblock(memory, reg) { > - unsigned long start = memblock_region_memory_base_pfn(reg); > - unsigned long end = memblock_region_memory_end_pfn(reg); > - > - if (end >= end_pfn) > - end = end_pfn; > - if (start >= end) > - break; > - > - free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT); > - } > - > - /* Reserve the lowmem memblock reserved regions in bootmem. */ > - for_each_memblock(reserved, reg) { > - unsigned long start = memblock_region_reserved_base_pfn(reg); > - unsigned long end = memblock_region_reserved_end_pfn(reg); > - > - if (end >= end_pfn) > - end = end_pfn; > - if (start >= end) > - break; > - > - reserve_bootmem(__pfn_to_phys(start), > - (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT); > - } > -} > - > static void __init uc32_bootmem_free(unsigned long min, unsigned long max_low, > unsigned long max_high) > { > @@ -232,7 +180,7 @@ void __init bootmem_init(void) > > find_limits(&min, &max_low, &max_high); > > - uc32_bootmem_init(min, max_low); > + node_set_online(0); > > #ifdef CONFIG_SWIOTLB > swiotlb_init(1); > -- > 2.7.4
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig index 03f991e..cff4b9d 100644 --- a/arch/unicore32/Kconfig +++ b/arch/unicore32/Kconfig @@ -5,6 +5,7 @@ config UNICORE32 select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select HAVE_MEMBLOCK + select NO_BOOTMEM select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_BZIP2 diff --git a/arch/unicore32/mm/init.c b/arch/unicore32/mm/init.c index f4950fb..44ccc15 100644 --- a/arch/unicore32/mm/init.c +++ b/arch/unicore32/mm/init.c @@ -84,58 +84,6 @@ static void __init find_limits(unsigned long *min, unsigned long *max_low, } } -static void __init uc32_bootmem_init(unsigned long start_pfn, - unsigned long end_pfn) -{ - struct memblock_region *reg; - unsigned int boot_pages; - phys_addr_t bitmap; - pg_data_t *pgdat; - - /* - * Allocate the bootmem bitmap page. This must be in a region - * of memory which has already been mapped. - */ - boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); - bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES, - __pfn_to_phys(end_pfn)); - - /* - * Initialise the bootmem allocator, handing the - * memory banks over to bootmem. - */ - node_set_online(0); - pgdat = NODE_DATA(0); - init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn); - - /* Free the lowmem regions from memblock into bootmem. */ - for_each_memblock(memory, reg) { - unsigned long start = memblock_region_memory_base_pfn(reg); - unsigned long end = memblock_region_memory_end_pfn(reg); - - if (end >= end_pfn) - end = end_pfn; - if (start >= end) - break; - - free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT); - } - - /* Reserve the lowmem memblock reserved regions in bootmem. */ - for_each_memblock(reserved, reg) { - unsigned long start = memblock_region_reserved_base_pfn(reg); - unsigned long end = memblock_region_reserved_end_pfn(reg); - - if (end >= end_pfn) - end = end_pfn; - if (start >= end) - break; - - reserve_bootmem(__pfn_to_phys(start), - (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT); - } -} - static void __init uc32_bootmem_free(unsigned long min, unsigned long max_low, unsigned long max_high) { @@ -232,7 +180,7 @@ void __init bootmem_init(void) find_limits(&min, &max_low, &max_high); - uc32_bootmem_init(min, max_low); + node_set_online(0); #ifdef CONFIG_SWIOTLB swiotlb_init(1);
The unicore32 already supports memblock and uses it for some early memory reservations, e.g initrd and the page tables. At some point unicore32 allocates the bootmem bitmap from the memblock and then hands over the memory reservations from memblock to bootmem. This patch removes the bootmem initialization and leaves memblock as the only boot time memory manager for unicore32. Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> --- I couldn't get unicore32 toolchain as the only link I was able to find [1] gives me timeout, so the best I could do to check the changes was gcc <lots of flags> -c arch/unicore32/mm/init.c [1] http://mprc.pku.edu.cn/~guanxuetao/linux/uc4-1.0.5-hard.tgz arch/unicore32/Kconfig | 1 + arch/unicore32/mm/init.c | 54 +----------------------------------------------- 2 files changed, 2 insertions(+), 53 deletions(-)