Commit 233ba546 authored Mar 20, 2020 by Aneesh Kumar K.V Committed by Michael Ellerman Mar 27, 2020

powerpc/64: Avoid isync in flush_dcache_range()

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

parent 968339fa

arch/powerpc/include/asm/cacheflush.h

+1 −5

Original line number	Diff line number	Diff line
		@@ -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 i;

		if (IS_ENABLED(CONFIG_PPC64)) {
		if (IS_ENABLED(CONFIG_PPC64))
		mb(); /* sync */
		isync();
		}

		for (i = 0; i < size >> shift; i++, addr += bytes)
		dcbf(addr);
		mb(); /* sync */

		if (IS_ENABLED(CONFIG_PPC64))
		isync();
		}

		/*