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| author | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 09:38:02 +0400 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 09:38:02 +0400 |
| commit | 8b395265f81817385f12e62f03f795efb732a445 (patch) | |
| tree | 17f6b1f4f0e09330f108f0a9ffc5b30aa9166da1 /include/asm-sh/cpu-sh4 | |
| parent | 75c92acdd5b19a5e3536ed670e1122d73c635b4a (diff) | |
| download | linux-8b395265f81817385f12e62f03f795efb732a445.tar.xz | |
sh: Fix fatal oops in copy_user_page() on sh4a (SH7780).
We had a pretty interesting oops happening, where copy_user_page()
was down()'ing p3map_sem[] with a bogus offset (particularly, an
offset that hadn't been initialized with sema_init(), due to the
mismatch between cpu_data->dcache.n_aliases and what was assumed
based off of the old CACHE_ALIAS value).
Luckily, spinlock debugging caught this for us, and so we drop
the old hardcoded CACHE_ALIAS for sh4 completely and rely on the
run-time probed cpu_data->dcache.alias_mask. This in turn gets
the p3map_sem[] index right, and everything works again.
While we're at it, also convert to 4-level page tables..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/cpu-sh4')
| -rw-r--r-- | include/asm-sh/cpu-sh4/cacheflush.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/include/asm-sh/cpu-sh4/cacheflush.h b/include/asm-sh/cpu-sh4/cacheflush.h index f323567e085f..ea58c4c5944d 100644 --- a/include/asm-sh/cpu-sh4/cacheflush.h +++ b/include/asm-sh/cpu-sh4/cacheflush.h @@ -16,10 +16,6 @@ * caching; in which case they're only semi-broken), * so we need them. */ - -/* Page is 4K, OC size is 16K, there are four lines. */ -#define CACHE_ALIAS 0x00003000 - struct page; struct mm_struct; struct vm_area_struct; |