Commit a22c65f8 authored by Albrecht Dreß's avatar Albrecht Dreß Committed by Grant Likely

powerpc: tiny memcpy_(to|from)io optimisation

This trivial patch changes memcpy_(to|from)io as to transfer as many
32-bit words as possible in 32-bit accesses (in the current solution,
the last 32-bit word was transferred as 4 byte accesses).
Signed-off-by: default avatarAlbrecht Dreß <albrecht.dress@arcor.de>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent 5cc17d7e
......@@ -161,7 +161,7 @@ void _memcpy_fromio(void *dest, const volatile void __iomem *src,
dest++;
n--;
}
while(n > 4) {
while(n >= 4) {
*((u32 *)dest) = *((volatile u32 *)vsrc);
eieio();
vsrc += 4;
......@@ -190,7 +190,7 @@ void _memcpy_toio(volatile void __iomem *dest, const void *src, unsigned long n)
vdest++;
n--;
}
while(n > 4) {
while(n >= 4) {
*((volatile u32 *)vdest) = *((volatile u32 *)src);
src += 4;
vdest += 4;
......
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