Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

[linux-2.6-omap-h63xx.git] / arch / mips / mm / c-r4k.c

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index cc895dad71d2297094243bd5d23d8d411d4893c0..df04a315d8309d7303813338e9f6f46406288434 100644 (file)
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -323,7 +323,6 @@ static void __init r4k_blast_scache_setup(void)
 static inline void local_r4k_flush_cache_all(void * args)
 {
        r4k_blast_dcache();
-       r4k_blast_icache();
 }
 
 static void r4k_flush_cache_all(void)
@@ -359,21 +358,19 @@ static void r4k___flush_cache_all(void)
 static inline void local_r4k_flush_cache_range(void * args)
 {
        struct vm_area_struct *vma = args;
-       int exec;
 
        if (!(cpu_context(smp_processor_id(), vma->vm_mm)))
                return;
 
-       exec = vma->vm_flags & VM_EXEC;
-       if (cpu_has_dc_aliases || exec)
-               r4k_blast_dcache();
-       if (exec)
-               r4k_blast_icache();
+       r4k_blast_dcache();
 }
 
 static void r4k_flush_cache_range(struct vm_area_struct *vma,
        unsigned long start, unsigned long end)
 {
+       if (!cpu_has_dc_aliases)
+               return;
+
        r4k_on_each_cpu(local_r4k_flush_cache_range, vma, 1, 1);
 }
 
@@ -384,18 +381,21 @@ static inline void local_r4k_flush_cache_mm(void * args)
        if (!cpu_context(smp_processor_id(), mm))
                return;
 
-       r4k_blast_dcache();
-       r4k_blast_icache();
-
        /*
         * Kludge alert.  For obscure reasons R4000SC and R4400SC go nuts if we
         * only flush the primary caches but R10000 and R12000 behave sane ...
+        * R4000SC and R4400SC indexed S-cache ops also invalidate primary
+        * caches, so we can bail out early.
         */
        if (current_cpu_data.cputype == CPU_R4000SC ||
            current_cpu_data.cputype == CPU_R4000MC ||
            current_cpu_data.cputype == CPU_R4400SC ||
-           current_cpu_data.cputype == CPU_R4400MC)
+           current_cpu_data.cputype == CPU_R4400MC) {
                r4k_blast_scache();
+               return;
+       }
+
+       r4k_blast_dcache();
 }
 
 static void r4k_flush_cache_mm(struct mm_struct *mm)