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parisc: ensure that mmapped shared pages are aligned at SHMLBA addresses

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Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
John David Anglin 2013-02-02 23:44:59 +00:00 committed by Helge Deller
parent 027f27c4ec
commit 5ca8b91df8
1 changed files with 5 additions and 4 deletions
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9
arch/parisc/kernel/sys_parisc.c
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@ -94,11 +94,12 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
{
if (len > TASK_SIZE)
return -ENOMEM;
/* Might want to check for cache aliasing issues for MAP_FIXED case
* like ARM or MIPS ??? --BenH.
*/
if (flags & MAP_FIXED)
if (flags & MAP_FIXED) {
if ((flags & MAP_SHARED) &&
(addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
return -EINVAL;
return addr;
}
if (!addr)
addr = TASK_UNMAPPED_BASE;