Commit d10040f7 authored by Paul Mundt's avatar Paul Mundt
Browse files

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: default avatarPaul Mundt <lethal@linux-sh.org>
parent 1a442fe0

arch/sh/mm/cache-sh4.c

+2 −2
Original line number Diff line number Diff line
@@ -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)