diff options
Diffstat (limited to 'target/linux/generic/pending-4.4/094-MIPS-c-r4k-Fix-size-calc-when-avoiding-IPIs-for-smal.patch')
| -rw-r--r-- | target/linux/generic/pending-4.4/094-MIPS-c-r4k-Fix-size-calc-when-avoiding-IPIs-for-smal.patch | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/target/linux/generic/pending-4.4/094-MIPS-c-r4k-Fix-size-calc-when-avoiding-IPIs-for-smal.patch b/target/linux/generic/pending-4.4/094-MIPS-c-r4k-Fix-size-calc-when-avoiding-IPIs-for-smal.patch deleted file mode 100644 index 733d9c7..0000000 --- a/target/linux/generic/pending-4.4/094-MIPS-c-r4k-Fix-size-calc-when-avoiding-IPIs-for-smal.patch +++ /dev/null @@ -1,38 +0,0 @@ -From: Paul Burton <paul.burton@imgtec.com> -Date: Mon, 5 Sep 2016 15:24:54 +0100 -Subject: [PATCH] MIPS: c-r4k: Fix size calc when avoiding IPIs for small - icache flushes - -Commit f70ddc07b637 ("MIPS: c-r4k: Avoid small flush_icache_range SMP -calls") adds checks to force use of hit-type cache ops for small icache -flushes where they are globalised & index-type cache ops aren't, in -order to avoid the overhead of IPIs in those cases. However it -calculated the size of the region being flushed incorrectly, subtracting -the end address from the start address rather than the reverse. This -would have led to an overflow with size wrapping round to some large -value, and likely to the special case for avoiding IPIs not actually -being hit. - -Signed-off-by: Paul Burton <paul.burton@imgtec.com> -Cc: James Hogan <james.hogan@imgtec.com> -Fixes: f70ddc07b637 ("MIPS: c-r4k: Avoid small flush_icache_range SMP calls") -Reviewed-by: James Hogan <james.hogan@imgtec.com> -Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> -Cc: Huacai Chen <chenhc@lemote.com> -Cc: linux-mips@linux-mips.org -Cc: linux-kernel@vger.kernel.org -Patchwork: https://patchwork.linux-mips.org/patch/14211/ -Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---- - ---- a/arch/mips/mm/c-r4k.c -+++ b/arch/mips/mm/c-r4k.c -@@ -781,7 +781,7 @@ static void r4k_flush_icache_range(unsig - * If address-based cache ops are globalized, then we may be - * able to avoid the IPI for small flushes. - */ -- size = start - end; -+ size = end - start; - cache_size = icache_size; - if (!cpu_has_ic_fills_f_dc) { - size *= 2; |