kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

ARM: Fix wrong shared bit for CPU write buffer bug test

Browse source 
It is unpredictable to have the same memory mapped using different
shared bit settings for ARMv6 and ARMv7 CPUs.  Fix this for the CPU
write buffer bug test.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2009-12-23 19:54:31 +00:00
parent d9fd3ab89f
commit 52e8bfd81a
1 changed files with 2 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
arch/arm/mm/fault-armv.c
View file

@ -207,9 +207,8 @@ void __init check_writebuffer_bugs(void)
page = alloc_page(GFP_KERNEL);
if (page) {
unsigned long *p1, *p2;
pgprot_t prot = __pgprot(L_PTE_PRESENT|L_PTE_YOUNG|
L_PTE_DIRTY|L_PTE_WRITE|
L_PTE_MT_BUFFERABLE);
pgprot_t prot = __pgprot_modify(PAGE_KERNEL,
L_PTE_MT_MASK, L_PTE_MT_BUFFERABLE);
p1 = vmap(&page, 1, VM_IOREMAP, prot);
p2 = vmap(&page, 1, VM_IOREMAP, prot);