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powerpc/64: Avoid isync in flush_dcache_range()

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As per ISA an isync is only needed on instruction cache block
invalidate. Remove the same from dcache invalidate.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200320103242.229223-1-aneesh.kumar@linux.ibm.com
This commit is contained in:
Aneesh Kumar K.V
2020-03-20 16:02:42 +05:30
committed by Michael Ellerman
parent 968339fad4
commit 233ba54618
1 changed files with 1 additions and 5 deletions
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6
arch/powerpc/include/asm/cacheflush.h
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@@ -65,17 +65,13 @@ static inline void flush_dcache_range(unsigned long start, unsigned long stop)
unsigned long size = stop - (unsigned long)addr + (bytes - 1); unsigned long size = stop - (unsigned long)addr + (bytes - 1);
unsigned long i; unsigned long i;
if (IS_ENABLED(CONFIG_PPC64)) { if (IS_ENABLED(CONFIG_PPC64))
mb(); /* sync */ mb(); /* sync */
isync();
}
for (i = 0; i < size >> shift; i++, addr += bytes) for (i = 0; i < size >> shift; i++, addr += bytes)
dcbf(addr); dcbf(addr);
mb(); /* sync */ mb(); /* sync */
if (IS_ENABLED(CONFIG_PPC64))
isync();
} }
/* /*