Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH CPA] [1/28] Shrink __PAGE_KERNEL/__PAGE_KERNEL_EXEC on non PAE kernels | Date | Thu, 3 Jan 2008 16:24:15 +0100 (CET) |
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No need to make it 64bit there.
Signed-off-by: Andi Kleen <ak@suse.de>
--- arch/x86/mm/init_32.c | 4 ++-- include/asm-x86/pgtable_32.h | 3 ++- 2 files changed, 4 insertions(+), 3 deletions(-)
Index: linux/arch/x86/mm/init_32.c =================================================================== --- linux.orig/arch/x86/mm/init_32.c +++ linux/arch/x86/mm/init_32.c @@ -326,9 +326,9 @@ static void __init set_highmem_pages_ini #define set_highmem_pages_init(bad_ppro) do { } while (0) #endif /* CONFIG_HIGHMEM */ -unsigned long long __PAGE_KERNEL = _PAGE_KERNEL; +typeof_field(pgprot_t, pgprot) __PAGE_KERNEL = _PAGE_KERNEL; EXPORT_SYMBOL(__PAGE_KERNEL); -unsigned long long __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC; +typeof_field(pgprot_t, pgprot) __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC; #ifdef CONFIG_NUMA extern void __init remap_numa_kva(void); Index: linux/include/asm-x86/pgtable_32.h =================================================================== --- linux.orig/include/asm-x86/pgtable_32.h +++ linux/include/asm-x86/pgtable_32.h @@ -153,7 +153,8 @@ void paging_init(void); #define _PAGE_KERNEL_EXEC \ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) -extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC; +#define typeof_field(t, m) typeof(((t *)0)->m) +extern typeof_field(pgprot_t, pgprot) __PAGE_KERNEL, __PAGE_KERNEL_EXEC; #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
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