MIPS: cache: Provide cache flush operations for XFS
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/
diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c
index e6b0efd..0765583 100644
--- a/arch/mips/mm/c-r3k.c
+++ b/arch/mips/mm/c-r3k.c
@@ -299,6 +299,11 @@
write_c0_status(flags);
}
+static void r3k_flush_kernel_vmap_range(unsigned long vaddr, int size)
+{
+ BUG();
+}
+
static void r3k_dma_cache_wback_inv(unsigned long start, unsigned long size)
{
/* Catch bad driver code */
@@ -323,6 +328,8 @@
flush_icache_range = r3k_flush_icache_range;
local_flush_icache_range = r3k_flush_icache_range;
+ __flush_kernel_vmap_range = r3k_flush_kernel_vmap_range;
+
flush_cache_sigtramp = r3k_flush_cache_sigtramp;
local_flush_data_cache_page = local_r3k_flush_data_cache_page;
flush_data_cache_page = r3k_flush_data_cache_page;