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authorScott Wood <scottwood@freescale.com>2015-04-16 02:40:23 +0200
committerScott Wood <scottwood@freescale.com>2015-08-08 05:59:20 +0200
commit2f7d2b74a9dd9140053f143e1c94da0fef3c1109 (patch)
treecc90ce077e6bfa19440953c1914b78e690182403 /arch/powerpc/include/asm/cacheflush.h
parentpowerpc: add support for csum_add() (diff)
downloadlinux-2f7d2b74a9dd9140053f143e1c94da0fef3c1109.tar.xz
linux-2f7d2b74a9dd9140053f143e1c94da0fef3c1109.zip
powerpc/mm: Don't call __flush_dcache_icache_phys() with PA>VA
__flush_dcache_icache_phys() requires the ability to access the memory with the MMU disabled, which means that on a 32-bit system any memory above 4 GiB is inaccessible. In particular, mpc86xx is 32-bit and can have more than 4 GiB of RAM. Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/include/asm/cacheflush.h')
-rw-r--r--arch/powerpc/include/asm/cacheflush.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/cacheflush.h b/arch/powerpc/include/asm/cacheflush.h
index 30b35fff2dea..6229e6b6037b 100644
--- a/arch/powerpc/include/asm/cacheflush.h
+++ b/arch/powerpc/include/asm/cacheflush.h
@@ -40,7 +40,12 @@ extern void __flush_dcache_icache(void *page_va);
extern void flush_dcache_icache_page(struct page *page);
#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
extern void __flush_dcache_icache_phys(unsigned long physaddr);
-#endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
+#else
+static inline void __flush_dcache_icache_phys(unsigned long physaddr)
+{
+ BUG();
+}
+#endif
extern void flush_dcache_range(unsigned long start, unsigned long stop);
#ifdef CONFIG_PPC32