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ARM: 8237/1: fix flush_pfn_alias

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L1_CACHE_BYTES could be larger than real L1 cache line size.
In that case, flush_pfn_alias() would omit to flush 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 02:54:27 +01:00 committed by Russell King
parent 802318743a
commit 12e669b487
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mm/flush.c
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@ -33,7 +33,7 @@ static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr)
asm( "mcrr p15, 0, %1, %0, c14\n"
" mcr p15, 0, %2, c7, c10, 4"
:
: "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES), "r" (zero)
: "r" (to), "r" (to + PAGE_SIZE - 1), "r" (zero)
: "cc");
}