Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (31 commits)
  [MIPS] Remove duplicate ISA DMA code for 0 DMA channel case.
  [MIPS] Remove unused definition of cpu_to_lelongp()
  [MIPS] Remove userspace proofing from <asm/bitops.h>.
  [MIPS] Remove old junk left from old atomic_lock.
  [MIPS] Use conditional traps for BUG_ON on MIPS II and better.
  [MIPS] mips HPT cleanup: make clocksource_mips public
  [MIPS] do_IRQ cleanup
  [MIPS] Avoid dupliate D-cache flush on R400C / R4400 SC and MC variants.
  [MIPS] Remove redundant r4k_blast_icache() calls
  [MIPS] Work around bogus gcc warnings.
  [MIPS] Fix double inclusions
  [MIPS] use generic_handle_irq, handle_level_irq, handle_percpu_irq
  [MIPS] IRQ cleanups
  [MIPS] mips hpt cleanup: get rid of mips_hpt_init
  [MIPS] PB1200: Remove duplicate definitions
  [MIPS] Fix alignment hole in struct cache_desc; shrink struct.
  [MIPS] Oprofile: kernel support for the R10000.
  [MIPS] Remove unused R10000 performance counter definitions.
  [MIPS] Add support for kexec
  [MIPS] Don't print presence of WAIT instruction on bootup.
  ...

1 files changed, 11 insertions, 11 deletions

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index cc895dad71d2..df04a315d830 100644
--- 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)