[MIPS] Remove useless S-cache flushes.

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

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index d708833..c91b596 100644 (file)
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -7,6 +7,7 @@
  * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Ralf Baechle (ralf@gnu.org)
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  */
+#include <linux/hardirq.h>
 #include <linux/init.h>
 #include <linux/highmem.h>
 #include <linux/kernel.h>
@@ -345,11 +346,26 @@ static void r4k___flush_cache_all(void)
        r4k_on_each_cpu(local_r4k___flush_cache_all, NULL, 1, 1);
 }
 
+static inline int has_valid_asid(const struct mm_struct *mm)
+{
+#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC)
+       int i;
+
+       for_each_online_cpu(i)
+               if (cpu_context(i, mm))
+                       return 1;
+
+       return 0;
+#else
+       return cpu_context(smp_processor_id(), mm);
+#endif
+}
+
 static inline void local_r4k_flush_cache_range(void * args)
 {
        struct vm_area_struct *vma = args;
 
-       if (!(cpu_context(smp_processor_id(), vma->vm_mm)))
+       if (!(has_valid_asid(vma->vm_mm)))
                return;
 
        r4k_blast_dcache();
@@ -368,7 +384,7 @@ static inline void local_r4k_flush_cache_mm(void * args)
 {
        struct mm_struct *mm = args;
 
-       if (!cpu_context(smp_processor_id(), mm))
+       if (!has_valid_asid(mm))
                return;
 
        /*
@@ -420,7 +436,7 @@ static inline void local_r4k_flush_cache_page(void *args)
         * If ownes no valid ASID yet, cannot possibly have gotten
         * this page into the cache.
         */
-       if (cpu_context(smp_processor_id(), mm) == 0)
+       if (!has_valid_asid(mm))
                return;
 
        addr &= PAGE_MASK;
@@ -433,7 +449,7 @@ static inline void local_r4k_flush_cache_page(void *args)
         * If the page isn't marked valid, the page cannot possibly be
         * in the cache.
         */
-       if (!(pte_val(*ptep) & _PAGE_PRESENT))
+       if (!(pte_present(*ptep)))
                return;
 
        if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID))
@@ -452,8 +468,6 @@ static inline void local_r4k_flush_cache_page(void *args)
 
        if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) {
                r4k_blast_dcache_page(addr);
-               if (exec && !cpu_icache_snoops_remote_store)
-                       r4k_blast_scache_page(addr);
        }
        if (exec) {
                if (vaddr && cpu_has_vtag_icache && mm == current->active_mm) {
@@ -492,7 +506,11 @@ static inline void local_r4k_flush_data_cache_page(void * addr)
 
 static void r4k_flush_data_cache_page(unsigned long addr)
 {
-       r4k_on_each_cpu(local_r4k_flush_data_cache_page, (void *) addr, 1, 1);
+       if (in_atomic())
+               local_r4k_flush_data_cache_page((void *)addr);
+       else
+               r4k_on_each_cpu(local_r4k_flush_data_cache_page, (void *) addr,
+                               1, 1);
 }
 
 struct flush_icache_range_args {
@@ -513,13 +531,6 @@ static inline void local_r4k_flush_icache_range(void *args)
                        R4600_HIT_CACHEOP_WAR_IMPL;
                        protected_blast_dcache_range(start, end);
                }
-
-               if (!cpu_icache_snoops_remote_store && scache_size) {
-                       if (end - start > scache_size)
-                               r4k_blast_scache();
-                       else
-                               protected_blast_scache_range(start, end);
-               }
        }
 
        if (end - start > icache_size)