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authorPaul Mundt <lethal@linux-sh.org>2007-09-24 16:38:25 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-09-24 16:38:25 +0900
commitd10040f7eb808cd984b563d1cf727a1020990a2e (patch)
tree08bb8f1357b41ee194b7f198b82af90fe9db8ccb /arch/sh/mm/cache-sh4.c
parent1a442fe02d205d6980202b07f799ab9336e72ad7 (diff)
downloadop-kernel-dev-d10040f7eb808cd984b563d1cf727a1020990a2e.zip
op-kernel-dev-d10040f7eb808cd984b563d1cf727a1020990a2e.tar.gz
sh: Fix alias calculation for non-aliasing cases.
There was an off-by-1 on the cache alias detection logic on SH-4, which caused n_aliases to always be 1 even when the page size precluded the existence of aliases. With this corrected, 64KB pages happily reports n_aliases == 0, and hits the appropriate fast paths in the flushing routines. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/cache-sh4.c')
-rw-r--r--arch/sh/mm/cache-sh4.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index bbc2264..6c36c2f 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -2,7 +2,7 @@
* arch/sh/mm/cache-sh4.c
*
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
- * Copyright (C) 2001 - 2006 Paul Mundt
+ * Copyright (C) 2001 - 2007 Paul Mundt
* Copyright (C) 2003 Richard Curnow
*
* This file is subject to the terms and conditions of the GNU General Public
@@ -44,7 +44,7 @@ static void (*__flush_dcache_segment_fn)(unsigned long, unsigned long) =
static void compute_alias(struct cache_info *c)
{
c->alias_mask = ((c->sets - 1) << c->entry_shift) & ~(PAGE_SIZE - 1);
- c->n_aliases = (c->alias_mask >> PAGE_SHIFT) + 1;
+ c->n_aliases = c->alias_mask ? (c->alias_mask >> PAGE_SHIFT) + 1 : 0;
}
static void __init emit_cache_params(void)
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