sh: Make cache flushers SMP-aware.

This does a bit of rework for making the cache flushers SMP-aware. The
function pointer-based flushers are renamed to local variants with the
exported interface being commonly implemented and wrapping as necessary.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 29 insertions, 12 deletions

diff --git a/arch/sh/include/asm/cacheflush.h b/arch/sh/include/asm/cacheflush.h
index 32299b7..11e4166 100644
--- a/arch/sh/include/asm/cacheflush.h
+++ b/arch/sh/include/asm/cacheflush.h
@@ -19,23 +19,40 @@
  *  - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
  *  - flush_cache_sigtramp(vaddr) flushes the signal trampoline
  */
-extern void (*flush_cache_all)(void);
-extern void (*flush_cache_mm)(struct mm_struct *mm);
-extern void (*flush_cache_dup_mm)(struct mm_struct *mm);
-extern void (*flush_cache_page)(struct vm_area_struct *vma,
-				unsigned long addr, unsigned long pfn);
-extern void (*flush_cache_range)(struct vm_area_struct *vma,
-				 unsigned long start, unsigned long end);
-extern void (*flush_dcache_page)(struct page *page);
-extern void (*flush_icache_range)(unsigned long start, unsigned long end);
-extern void (*flush_icache_page)(struct vm_area_struct *vma,
-				 struct page *page);
-extern void (*flush_cache_sigtramp)(unsigned long address);
+extern void (*local_flush_cache_all)(void *args);
+extern void (*local_flush_cache_mm)(void *args);
+extern void (*local_flush_cache_dup_mm)(void *args);
+extern void (*local_flush_cache_page)(void *args);
+extern void (*local_flush_cache_range)(void *args);
+extern void (*local_flush_dcache_page)(void *args);
+extern void (*local_flush_icache_range)(void *args);
+extern void (*local_flush_icache_page)(void *args);
+extern void (*local_flush_cache_sigtramp)(void *args);
+
+static inline void cache_noop(void *args) { }
 
 extern void (*__flush_wback_region)(void *start, int size);
 extern void (*__flush_purge_region)(void *start, int size);
 extern void (*__flush_invalidate_region)(void *start, int size);
 
+extern void flush_cache_all(void);
+extern void flush_cache_mm(struct mm_struct *mm);
+extern void flush_cache_dup_mm(struct mm_struct *mm);
+extern void flush_cache_page(struct vm_area_struct *vma,
+				unsigned long addr, unsigned long pfn);
+extern void flush_cache_range(struct vm_area_struct *vma,
+				 unsigned long start, unsigned long end);
+extern void flush_dcache_page(struct page *page);
+extern void flush_icache_range(unsigned long start, unsigned long end);
+extern void flush_icache_page(struct vm_area_struct *vma,
+				 struct page *page);
+extern void flush_cache_sigtramp(unsigned long address);
+
+struct flusher_data {
+	struct vm_area_struct *vma;
+	unsigned long addr1, addr2;
+};
+
 #define ARCH_HAS_FLUSH_ANON_PAGE
 extern void __flush_anon_page(struct page *page, unsigned long);