ARM: Fix errata 411920 workarounds

Errata 411920 indicates that any "invalidate entire instruction cache"
operation can fail if the right conditions are present.  This is not
limited just to those operations in flush.c, but elsewhere.  Place the
workaround in the already existing __flush_icache_all() function
instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 6 insertions, 25 deletions

diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index b27942909b2..7f294f307c8 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -18,10 +18,6 @@
 
 #include "mm.h"
 
-#ifdef CONFIG_ARM_ERRATA_411920
-extern void v6_icache_inval_all(void);
-#endif
-
 #ifdef CONFIG_CPU_CACHE_VIPT
 
 #define ALIAS_FLUSH_START       0xffff4000
@@ -35,16 +31,11 @@ static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr)
         flush_tlb_kernel_page(to);
 
         asm(    "mcrr   p15, 0, %1, %0, c14\n"
-        "       mcr     p15, 0, %2, c7, c10, 4\n"
-#ifndef CONFIG_ARM_ERRATA_411920
-        "       mcr     p15, 0, %2, c7, c5, 0\n"
-#endif
+        "       mcr     p15, 0, %2, c7, c10, 4"
             :
             : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES), "r" (zero)
             : "cc");
-#ifdef CONFIG_ARM_ERRATA_411920
-        v6_icache_inval_all();
-#endif
+        __flush_icache_all();
 }
 
 void flush_cache_mm(struct mm_struct *mm)
@@ -57,16 +48,11 @@ void flush_cache_mm(struct mm_struct *mm)
 
         if (cache_is_vipt_aliasing()) {
                 asm(    "mcr    p15, 0, %0, c7, c14, 0\n"
-                "       mcr     p15, 0, %0, c7, c10, 4\n"
-#ifndef CONFIG_ARM_ERRATA_411920
-                "       mcr     p15, 0, %0, c7, c5, 0\n"
-#endif
+                "       mcr     p15, 0, %0, c7, c10, 4"
                     :
                     : "r" (0)
                     : "cc");
-#ifdef CONFIG_ARM_ERRATA_411920
-                v6_icache_inval_all();
-#endif
+                __flush_icache_all();
         }
 }
 
@@ -81,16 +67,11 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned
 
         if (cache_is_vipt_aliasing()) {
                 asm(    "mcr    p15, 0, %0, c7, c14, 0\n"
-                "       mcr     p15, 0, %0, c7, c10, 4\n"
-#ifndef CONFIG_ARM_ERRATA_411920
-                "       mcr     p15, 0, %0, c7, c5, 0\n"
-#endif
+                "       mcr     p15, 0, %0, c7, c10, 4"
                     :
                     : "r" (0)
                     : "cc");
-#ifdef CONFIG_ARM_ERRATA_411920
-                v6_icache_inval_all();
-#endif
+                __flush_icache_all();
         }
 }