string: factorize skip_spaces and export it to be generally available

[safe/jmp/linux-2.6] / arch / sh / mm / cache.c

diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index e8810f7..e9415d3 100644 (file)
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -27,8 +27,11 @@ void (*local_flush_icache_page)(void *args) = cache_noop;
 void (*local_flush_cache_sigtramp)(void *args) = cache_noop;
 
 void (*__flush_wback_region)(void *start, int size);
+EXPORT_SYMBOL(__flush_wback_region);
 void (*__flush_purge_region)(void *start, int size);
+EXPORT_SYMBOL(__flush_purge_region);
 void (*__flush_invalidate_region)(void *start, int size);
+EXPORT_SYMBOL(__flush_invalidate_region);
 
 static inline void noop__flush_region(void *start, int size)
 {
@@ -161,6 +164,7 @@ void flush_cache_all(void)
 {
        cacheop_on_each_cpu(local_flush_cache_all, NULL, 1);
 }
+EXPORT_SYMBOL(flush_cache_all);
 
 void flush_cache_mm(struct mm_struct *mm)
 {
@@ -201,11 +205,13 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
 
        cacheop_on_each_cpu(local_flush_cache_range, (void *)&data, 1);
 }
+EXPORT_SYMBOL(flush_cache_range);
 
 void flush_dcache_page(struct page *page)
 {
        cacheop_on_each_cpu(local_flush_dcache_page, page, 1);
 }
+EXPORT_SYMBOL(flush_dcache_page);
 
 void flush_icache_range(unsigned long start, unsigned long end)
 {
@@ -271,6 +277,12 @@ static void __init emit_cache_params(void)
 
 void __init cpu_cache_init(void)
 {
+       unsigned int cache_disabled = 0;
+
+#ifdef CCR
+       cache_disabled = !(__raw_readl(CCR) & CCR_CACHE_ENABLE);
+#endif
+
        compute_alias(&boot_cpu_data.icache);
        compute_alias(&boot_cpu_data.dcache);
        compute_alias(&boot_cpu_data.scache);
@@ -279,6 +291,13 @@ void __init cpu_cache_init(void)
        __flush_purge_region            = noop__flush_region;
        __flush_invalidate_region       = noop__flush_region;
 
+       /*
+        * No flushing is necessary in the disabled cache case so we can
+        * just keep the noop functions in local_flush_..() and __flush_..()
+        */
+       if (unlikely(cache_disabled))
+               goto skip;
+
        if (boot_cpu_data.family == CPU_FAMILY_SH2) {
                extern void __weak sh2_cache_init(void);
 
@@ -318,5 +337,6 @@ void __init cpu_cache_init(void)
                sh5_cache_init();
        }
 
+skip:
        emit_cache_params();
 }