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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-05-28 14:02:14 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 10:48:13 (GMT) |
| commit | a7bf0bd5e6af7fe69342dabf2a3b721f0163469a (patch) | |
| tree | 3f7e08f0df4c5eccf81732dcf95b8cc4efafa203 /arch/x86/mm | |
| parent | 1ecd27657b735128a728ebf0c31fce5e1456718a (diff) | |
| download | linux-a7bf0bd5e6af7fe69342dabf2a3b721f0163469a.tar.xz | |
build: add __page_aligned_data and __page_aligned_bss
Making a variable page-aligned by using
__attribute__((section(".data.page_aligned"))) is fragile because if
sizeof(variable) is not also a multiple of page size, it leaves
variables in the remainder of the section unaligned.
This patch introduces two new qualifiers, __page_aligned_data and
__page_aligned_bss to set the section *and* the alignment of
variables. This makes page-aligned variables more robust because the
linker will make sure they're aligned properly. Unfortunately it
requires *all* page-aligned data to use these macros...
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/ioremap.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 416ea41..0561fde 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -394,8 +394,7 @@ static int __init early_ioremap_debug_setup(char *str) early_param("early_ioremap_debug", early_ioremap_debug_setup); static __initdata int after_paging_init; -static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] - __section(.bss.page_aligned); +static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss; static inline pmd_t * __init early_ioremap_pmd(unsigned long addr) { |