From 802318743a449f74d3fc952ad7cdcbd3a44dcdc2 Mon Sep 17 00:00:00 2001 From: Jungseung Lee Date: Sat, 29 Nov 2014 02:51:49 +0100 Subject: [PATCH] ARM: 8236/1: mm: fix discard_old_kernel_data L1_CACHE_BYTES could be larger value than real L1 cache line size. In that case, discard_old_kernel_data() would omit to invalidate last bytes as much as L1_CACHE_BYTES - real cache line size. So fix end address to "to + PAGE_SIZE -1". The bottom bits of the address is LINELEN. that is ignored by mcrr. Signed-off-by: Jungseung Lee Signed-off-by: Russell King --- arch/arm/mm/copypage-v6.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c index b9bcc9d79176..70423345da26 100644 --- a/arch/arm/mm/copypage-v6.c +++ b/arch/arm/mm/copypage-v6.c @@ -62,7 +62,7 @@ static void discard_old_kernel_data(void *kto) __asm__("mcrr p15, 0, %1, %0, c6 @ 0xec401f06" : : "r" (kto), - "r" ((unsigned long)kto + PAGE_SIZE - L1_CACHE_BYTES) + "r" ((unsigned long)kto + PAGE_SIZE - 1) : "cc"); }