Hello.
On 17-06-2011 19:20, Ralf Baechle wrote:
Ralf,
I'll second that request. We'll really need this, right now embedded XFS
users are hacking around it in horrible ways.
Here's my shot at the problem. I don't have the time to setup a XFS
filesystem and tools for testing before the weekend so all I claim is this
patch builds for R4000-class CPUs but it should be pretty close to the
real thing.
Naveen, can you give this patch a spin? Thanks!
Ralf
Signed-off-by: Ralf Baechle<ralf@xxxxxxxxxxxxxx>
[...]
diff --git a/arch/mips/include/asm/cacheflush.h b/arch/mips/include/asm/cacheflush.h
index 40bb9fd..69468de 100644
--- a/arch/mips/include/asm/cacheflush.h
+++ b/arch/mips/include/asm/cacheflush.h
@@ -114,4 +114,28 @@ unsigned long run_uncached(void *func);
extern void *kmap_coherent(struct page *page, unsigned long addr);
extern void kunmap_coherent(void);
+#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
+static inline void flush_kernel_dcache_page(struct page *page)
+{
+ BUG_ON(cpu_has_dc_aliases&& PageHighMem(page));
+}
+
+/*
+ * For now flush_kernel_vmap_range and invalidate_kernel_vmap_range both do a
+ * cache writeback and invalidate operation.
+ */
+extern void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
+
+static inline void flush_kernel_vmap_range(void *vaddr, int size)
+{
+ if (cpu_has_dc_aliases)
+ __flush_kernel_vmap_range((unsigned long) vaddr, size);
+}
+
+static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
+{
+ if (cpu_has_dc_aliases)
+ __flush_kernel_vmap_range((unsigned long) vaddr, size);
Not __invalidate_kernel_vmap_range()?
WBR, Sergei
