From 9c5a3d729cf430609d091ff610a7db363aafcd47 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Sat, 5 Apr 2008 15:13:23 +0100
Subject: [PATCH] [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>
---
 arch/mips/mm/c-r4k.c          | 14 ++++++++++++++
 arch/mips/mm/c-tx39.c         | 15 +++++++++++++++
 arch/mips/mm/cache.c          |  3 +++
 include/asm-mips/cacheflush.h | 18 ++++++++++++++++--
 4 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 6496925b5e29..77aefb4ebedd 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 b09d56981d53..a9f7f1f5e9b4 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 51ab1faa027d..f5903679ee6a 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 01e7eadc97e2..d5c0f2fda51b 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,
-- 
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