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authorPaul Mundt <lethal@linux-sh.org>2007-07-24 13:28:26 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-07-24 13:28:26 +0900
commit8cf1a74305688c85fc8d23ab7432a0c447ee6413 (patch)
treed43af5f2515db35ef6a705e5929780f91d34e898 /arch/sh/mm/cache-sh4.c
parentf695baf2df9e0413d3521661070103711545207a (diff)
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sh: Add kmap_coherent()/kunmap_coherent() interface for SH-4.
This wires up kmap_coherent() and kunmap_coherent() on SH-4, and moves away from the p3map_mutex and reserved P3 space, opting to use fixmaps for colouring instead. The copy_user_page()/clear_user_page() implementations are moved to this, which fixes the nasty blowups with spinlock debugging as a result of having some of these calls nested under the page table lock. 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.c11
1 files changed, 0 insertions, 11 deletions
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 981b040..5d0f73a 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -77,16 +77,8 @@ static void __init emit_cache_params(void)
/*
* SH-4 has virtually indexed and physically tagged cache.
*/
-
-/* Worst case assumed to be 64k cache, direct-mapped i.e. 4 synonym bits. */
-#define MAX_P3_MUTEXES 16
-
-struct mutex p3map_mutex[MAX_P3_MUTEXES];
-
void __init p3_cache_init(void)
{
- int i;
-
compute_alias(&current_cpu_data.icache);
compute_alias(&current_cpu_data.dcache);
@@ -109,9 +101,6 @@ void __init p3_cache_init(void)
if (ioremap_page_range(P3SEG, P3SEG + (PAGE_SIZE * 4), 0, PAGE_KERNEL))
panic("%s failed.", __FUNCTION__);
-
- for (i = 0; i < current_cpu_data.dcache.n_aliases; i++)
- mutex_init(&p3map_mutex[i]);
}
/*