Commit bc713dcf authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: fix prefetch workaround 



some early Athlon XP's and Opterons generate bogus faults on prefetch
instructions. The workaround for this regressed over .24 - reinstate it.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 08dcf29e

arch/x86/mm/fault.c

+2 −1
Original line number Diff line number Diff line
@@ -92,7 +92,8 @@ static int is_prefetch(struct pt_regs *regs, unsigned long addr, 
	unsigned char *max_instr;



#ifdef CONFIG_X86_32

	if (!(__supported_pte_mask & _PAGE_NX))

	/* Catch an obscure case of prefetch inside an NX page: */

	if ((__supported_pte_mask & _PAGE_NX) && (error_code & 16))

		return 0;

#endif