Merge branch 'for-linus' of ssh://master.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[pandora-kernel.git] / arch / mips / mm / cache.c

diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index ddd3a2d..31819c5 100644 (file)
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -25,7 +25,6 @@ void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start,
 void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page,
        unsigned long pfn);
 void (*flush_icache_range)(unsigned long start, unsigned long end);
-void (*flush_icache_page)(struct vm_area_struct *vma, struct page *page);
 
 /* MIPS specific cache operations */
 void (*flush_cache_sigtramp)(unsigned long addr);
@@ -33,6 +32,7 @@ void (*local_flush_data_cache_page)(void * addr);
 void (*flush_data_cache_page)(unsigned long addr);
 void (*flush_icache_all)(void);
 
+EXPORT_SYMBOL_GPL(local_flush_data_cache_page);
 EXPORT_SYMBOL(flush_data_cache_page);
 
 #ifdef CONFIG_DMA_NONCOHERENT
@@ -70,6 +70,8 @@ void __flush_dcache_page(struct page *page)
        struct address_space *mapping = page_mapping(page);
        unsigned long addr;
 
+       if (PageHighMem(page))
+               return;
        if (mapping && !mapping_mapped(mapping)) {
                SetPageDcacheDirty(page);
                return;
@@ -91,22 +93,20 @@ void __update_cache(struct vm_area_struct *vma, unsigned long address,
 {
        struct page *page;
        unsigned long pfn, addr;
+       int exec = (vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc;
 
        pfn = pte_pfn(pte);
-       if (pfn_valid(pfn) && (page = pfn_to_page(pfn), page_mapping(page)) &&
-           Page_dcache_dirty(page)) {
-               if (pages_do_alias((unsigned long)page_address(page),
-                                  address & PAGE_MASK)) {
-                       addr = (unsigned long) page_address(page);
+       if (unlikely(!pfn_valid(pfn)))
+               return;
+       page = pfn_to_page(pfn);
+       if (page_mapping(page) && Page_dcache_dirty(page)) {
+               addr = (unsigned long) page_address(page);
+               if (exec || pages_do_alias(addr, address & PAGE_MASK))
                        flush_data_cache_page(addr);
-               }
-
                ClearPageDcacheDirty(page);
        }
 }
 
-#define __weak __attribute__((weak))
-
 static char cache_panic[] __initdata = "Yeee, unsupported cache architecture.";
 
 void __init cpu_cache_init(void)