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Commit 52e8bfd8 authored by Russell King's avatar Russell King
Browse files

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



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: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent d9fd3ab8

arch/arm/mm/fault-armv.c

+2 −3
Original line number Diff line number Diff line
@@ -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);