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MIPS: cache: Provide cache flush operations for XFS

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Until now flush_kernel_vmap_range() and invalidate_kernel_vmap_range() did
not exist on MIPS resulting in heavy cache corruption on XFS filesystems.

Left for the post-3.0 time: optimization and make this work with highmem,
too.  Since the combination of highmem + cache aliases atm doesn't work
this isn't a regression.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/2505/
This commit is contained in:
Ralf Baechle
2011-06-17 16:20:28 +01:00
parent 2e5db86dd4
commit d9cdc901af
6 changed files with 84 additions and 0 deletions
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7
arch/mips/mm/c-tx39.c
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@@ -253,6 +253,11 @@ static void tx39_flush_icache_range(unsigned long start, unsigned long end)
}
}
static void tx39_flush_kernel_vmap_range(unsigned long vaddr, int size)
{
BUG();
}
static void tx39_dma_cache_wback_inv(unsigned long addr, unsigned long size)
{
unsigned long end;
@@ -394,6 +399,8 @@ void __cpuinit tx39_cache_init(void)
flush_icache_range = tx39_flush_icache_range;
local_flush_icache_range = tx39_flush_icache_range;
__flush_kernel_vmap_range = tx39_flush_kernel_vmap_range;
flush_cache_sigtramp = tx39_flush_cache_sigtramp;
local_flush_data_cache_page = local_tx39_flush_data_cache_page;
flush_data_cache_page = tx39_flush_data_cache_page;