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Commit 921fff35 authored by Christophe Leroy's avatar Christophe Leroy Committed by Scott Wood
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powerpc/8xx: CONFIG_DEBUG_PAGEALLOC requires ITLBmiss for kernel addresses 



When CONFIG_DEBUG_PAGEALLOC is activated, the initial TLB mapping gets
flushed to track accesses to wrong areas. Therefore, kernel addresses
will also generate ITLB misses.

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarScott Wood <oss@buserror.net>
parent 501ea766

arch/powerpc/kernel/head_8xx.S

+1 −1
Original line number Original line Diff line number Diff line
@@ -329,7 +329,7 @@ InstructionTLBMiss: 
	/* If we are faulting a kernel address, we have to use the

	/* If we are faulting a kernel address, we have to use the

	 * kernel page tables.

	 * kernel page tables.

	 */

	 */

#ifdef CONFIG_MODULES

#if defined(CONFIG_MODULES) || defined (CONFIG_DEBUG_PAGEALLOC)

	/* Only modules will cause ITLB Misses as we always

	/* Only modules will cause ITLB Misses as we always

	 * pin the first 8MB of kernel memory */

	 * pin the first 8MB of kernel memory */

	mfspr	r11, SPRN_SRR0	/* Get effective address of fault */

	mfspr	r11, SPRN_SRR0	/* Get effective address of fault */