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authorAl Viro <viro@zeniv.linux.org.uk>2009-12-05 23:10:44 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2009-12-11 14:44:59 +0300
commite77414e0aad6a1b063ba5e5750c582c75327ea6a (patch)
tree9492b584ce6a3e4f99570ce4517d7efaaff4fb93 /arch/arm/mm/mmap.c
parentbb52d6694002b9d632bb355f64daa045c6293a4e (diff)
downloadlinux-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/arm/mm/mmap.c')
-rw-r--r--arch/arm/mm/mmap.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index 2b7996401b0f..f5abc51c5a07 100644
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -54,7 +54,8 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
* We enforce the MAP_FIXED case.
*/
if (flags & MAP_FIXED) {
- if (aliasing && flags & MAP_SHARED && addr & (SHMLBA - 1))
+ if (aliasing && flags & MAP_SHARED &&
+ (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
return -EINVAL;
return addr;
}