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author | Al Viro <viro@zeniv.linux.org.uk> | 2009-12-05 20:10:44 (GMT) |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2009-12-11 11:44:59 (GMT) |
commit | e77414e0aad6a1b063ba5e5750c582c75327ea6a (patch) | |
tree | 9492b584ce6a3e4f99570ce4517d7efaaff4fb93 /arch/mips/kernel/syscall.c | |
parent | bb52d6694002b9d632bb355f64daa045c6293a4e (diff) | |
download | linux-fsl-qoriq-e77414e0aad6a1b063ba5e5750c582c75327ea6a.tar.xz |
fix broken aliasing checks for MAP_FIXED on sparc32, mips, arm and sh
We want addr - (pgoff << PAGE_SHIFT) consistently coloured...
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/mips/kernel/syscall.c')
-rw-r--r-- | arch/mips/kernel/syscall.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c index c25b2e7..3f7f466 100644 --- a/arch/mips/kernel/syscall.c +++ b/arch/mips/kernel/syscall.c @@ -93,7 +93,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, * We do not accept a shared mapping if it would violate * cache aliasing constraints. */ - if ((flags & MAP_SHARED) && (addr & shm_align_mask)) + if ((flags & MAP_SHARED) && + ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask)) return -EINVAL; return addr; } |