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ARM: 8236/1: mm: fix discard_old_kernel_data

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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 <js07.lee@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Jungseung Lee 2014-11-29 02:51:49 +01:00 committed by Russell King
parent 1d4d37159d
commit 802318743a
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mm/copypage-v6.c
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@ -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");
}