[MIPS] Handle aliases in vmalloc correctly.

flush_cache_vmap / flush_cache_vunmap were calling flush_cache_all which -
having been deprecated - turned into a nop ...

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

4 files changed, 48 insertions, 2 deletions

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 6496925b5e2..77aefb4ebed 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -361,6 +361,16 @@ static inline int has_valid_asid(const struct mm_struct *mm)
 #endif
 }
 
+static void r4k__flush_cache_vmap(void)
+{
+        r4k_blast_dcache();
+}
+
+static void r4k__flush_cache_vunmap(void)
+{
+        r4k_blast_dcache();
+}
+
 static inline void local_r4k_flush_cache_range(void * args)
 {
         struct vm_area_struct *vma = args;
@@ -1281,6 +1291,10 @@ void __cpuinit r4k_cache_init(void)
                                         PAGE_SIZE - 1);
         else
                 shm_align_mask = PAGE_SIZE-1;
+
+        __flush_cache_vmap      = r4k__flush_cache_vmap;
+        __flush_cache_vunmap    = r4k__flush_cache_vunmap;
+
         flush_cache_all         = cache_noop;
         __flush_cache_all       = r4k___flush_cache_all;
         flush_cache_mm          = r4k_flush_cache_mm;
diff --git a/arch/mips/mm/c-tx39.c b/arch/mips/mm/c-tx39.c
index b09d56981d5..a9f7f1f5e9b 100644
--- a/arch/mips/mm/c-tx39.c
+++ b/arch/mips/mm/c-tx39.c
@@ -122,6 +122,16 @@ static inline void tx39_blast_icache(void)
         local_irq_restore(flags);
 }
 
+static void tx39__flush_cache_vmap(void)
+{
+        tx39_blast_dcache();
+}
+
+static void tx39__flush_cache_vunmap(void)
+{
+        tx39_blast_dcache();
+}
+
 static inline void tx39_flush_cache_all(void)
 {
         if (!cpu_has_dc_aliases)
@@ -344,6 +354,8 @@ void __cpuinit tx39_cache_init(void)
         switch (current_cpu_type()) {
         case CPU_TX3912:
                 /* TX39/H core (writethru direct-map cache) */
+                __flush_cache_vmap      = tx39__flush_cache_vmap;
+                __flush_cache_vunmap    = tx39__flush_cache_vunmap;
                 flush_cache_all = tx39h_flush_icache_all;
                 __flush_cache_all       = tx39h_flush_icache_all;
                 flush_cache_mm          = (void *) tx39h_flush_icache_all;
@@ -369,6 +381,9 @@ void __cpuinit tx39_cache_init(void)
                 write_c0_wired(0);      /* set 8 on reset... */
                 /* board-dependent init code may set WBON */
 
+                __flush_cache_vmap      = tx39__flush_cache_vmap;
+                __flush_cache_vunmap    = tx39__flush_cache_vunmap;
+
                 flush_cache_all = tx39_flush_cache_all;
                 __flush_cache_all = tx39___flush_cache_all;
                 flush_cache_mm = tx39_flush_cache_mm;
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 51ab1faa027..f5903679ee6 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -30,6 +30,9 @@ 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_cache_vmap)(void);
+void (*__flush_cache_vunmap)(void);
+
 /* MIPS specific cache operations */
 void (*flush_cache_sigtramp)(unsigned long addr);
 void (*local_flush_data_cache_page)(void * addr);
diff --git a/include/asm-mips/cacheflush.h b/include/asm-mips/cacheflush.h
index 01e7eadc97e..d5c0f2fda51 100644
--- a/include/asm-mips/cacheflush.h
+++ b/include/asm-mips/cacheflush.h
@@ -63,8 +63,22 @@ static inline void flush_icache_page(struct vm_area_struct *vma,
 }
 
 extern void (*flush_icache_range)(unsigned long start, unsigned long end);
-#define flush_cache_vmap(start, end)            flush_cache_all()
-#define flush_cache_vunmap(start, end)          flush_cache_all()
+
+extern void (*__flush_cache_vmap)(void);
+
+static inline void flush_cache_vmap(unsigned long start, unsigned long end)
+{
+        if (cpu_has_dc_aliases)
+                __flush_cache_vmap();
+}
+
+extern void (*__flush_cache_vunmap)(void);
+
+static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
+{
+        if (cpu_has_dc_aliases)
+                __flush_cache_vunmap();
+}
 
 extern void copy_to_user_page(struct vm_area_struct *vma,
         struct page *page, unsigned long vaddr, void *dst, const void *src,