diff options
| author | Vivek Goyal <vgoyal@in.ibm.com> | 2006-10-21 18:37:01 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-10-21 18:37:01 +0200 |
| commit | 73bb8919b33d42cf75a0ed89bc9ca6a7128665be (patch) | |
| tree | 8dc8fd2f90a2b9b9c8ac98db813b297f91506ecc /arch/x86_64/kernel/e820.c | |
| parent | 469b1d8741a5970ad49f2b5a837811579ba0b6f2 (diff) | |
| download | op-kernel-dev-73bb8919b33d42cf75a0ed89bc9ca6a7128665be.zip op-kernel-dev-73bb8919b33d42cf75a0ed89bc9ca6a7128665be.tar.gz | |
[PATCH] x86-64: fix page align in e820 allocator
Currently some code pieces assume that address returned by find_e820_area()
are page aligned. But looks like find_e820_area() had no such intention
and hence one might end up stomping over some of the data. One such case
is bootmem allocator initialization code stomped over bss.
This patch modified find_e820_area() to return page aligned address. This
might be little wasteful of memory but at the same time probably it is
easier to handle page aligned memory.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/e820.c')
| -rw-r--r-- | arch/x86_64/kernel/e820.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c index b3f0908..a75c829 100644 --- a/arch/x86_64/kernel/e820.c +++ b/arch/x86_64/kernel/e820.c @@ -54,13 +54,13 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size) /* various gunk below that needed for SMP startup */ if (addr < 0x8000) { - *addrp = 0x8000; + *addrp = PAGE_ALIGN(0x8000); return 1; } /* direct mapping tables of the kernel */ if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) { - *addrp = table_end << PAGE_SHIFT; + *addrp = PAGE_ALIGN(table_end << PAGE_SHIFT); return 1; } @@ -68,18 +68,18 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size) #ifdef CONFIG_BLK_DEV_INITRD if (LOADER_TYPE && INITRD_START && last >= INITRD_START && addr < INITRD_START+INITRD_SIZE) { - *addrp = INITRD_START + INITRD_SIZE; + *addrp = PAGE_ALIGN(INITRD_START + INITRD_SIZE); return 1; } #endif /* kernel code */ - if (last >= __pa_symbol(&_text) && last < __pa_symbol(&_end)) { - *addrp = __pa_symbol(&_end); + if (last >= __pa_symbol(&_text) && addr < __pa_symbol(&_end)) { + *addrp = PAGE_ALIGN(__pa_symbol(&_end)); return 1; } if (last >= ebda_addr && addr < ebda_addr + ebda_size) { - *addrp = ebda_addr + ebda_size; + *addrp = PAGE_ALIGN(ebda_addr + ebda_size); return 1; } @@ -152,7 +152,7 @@ unsigned long __init find_e820_area(unsigned long start, unsigned long end, unsi continue; while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size) ; - last = addr + size; + last = PAGE_ALIGN(addr) + size; if (last > ei->addr + ei->size) continue; if (last > end) |
