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-octeon.c b/arch/mips/mm/c-octeon.c
index 16c4d256..daa81f7 100644
--- a/arch/mips/mm/c-octeon.c
+++ b/arch/mips/mm/c-octeon.c
@@ -169,6 +169,10 @@
octeon_flush_icache_all_cores(vma);
}
+static void octeon_flush_kernel_vmap_range(unsigned long vaddr, int size)
+{
+ BUG();
+}
/**
* Probe Octeon's caches
@@ -273,6 +277,8 @@
flush_icache_range = octeon_flush_icache_range;
local_flush_icache_range = local_octeon_flush_icache_range;
+ __flush_kernel_vmap_range = octeon_flush_kernel_vmap_range;
+
build_clear_page();
build_copy_page();
}