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| author | Paul Mundt <lethal@linux-sh.org> | 2007-09-24 16:38:25 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2007-09-24 16:38:25 +0900 |
| commit | d10040f7eb808cd984b563d1cf727a1020990a2e (patch) | |
| tree | 08bb8f1357b41ee194b7f198b82af90fe9db8ccb /arch | |
| parent | 1a442fe02d205d6980202b07f799ab9336e72ad7 (diff) | |
| download | linux-d10040f7eb808cd984b563d1cf727a1020990a2e.tar.gz linux-d10040f7eb808cd984b563d1cf727a1020990a2e.tar.bz2 linux-d10040f7eb808cd984b563d1cf727a1020990a2e.zip | |
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')
| -rw-r--r-- | arch/sh/mm/cache-sh4.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c index bbc226469aa1..6c36c2fb8199 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) |