redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

x86: cpa: ensure page alignment

Browse source 
the cpa API is page aligned - warn about any weird alignments.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-02-13 11:04:50 +01:00 committed by Ingo Molnar
parent 7bfeab9af9
commit 69b1415e93
1 changed files with 9 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
arch/x86/mm/pageattr.c
View file

@ -688,6 +688,15 @@ static int change_page_attr_set_clr(unsigned long addr, int numpages,
if (!pgprot_val(mask_set) && !pgprot_val(mask_clr))
return 0;
/* Ensure we are PAGE_SIZE aligned */
if (addr & ~PAGE_MASK) {
addr &= PAGE_MASK;
/*
* People should not be passing in unaligned addresses:
*/
WARN_ON_ONCE(1);
}
cpa.vaddr = addr;
cpa.numpages = numpages;
cpa.mask_set = mask_set;