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authorJulien Beraud <julien.beraud@spectracom.orolia.com>2017-04-05 15:03:44 +0800
committerLey Foon Tan <ley.foon.tan@intel.com>2017-05-08 16:59:19 +0800
commit4b40c1c092a932b5b5ab8154235080f02ae19a34 (patch)
treead76a5b1939e5965f12e129dade15c1b8de477d7 /arch/nios2/include/asm
parentnios2: enable earlycon support (diff)
downloadlinux-dev-4b40c1c092a932b5b5ab8154235080f02ae19a34.tar.xz
linux-dev-4b40c1c092a932b5b5ab8154235080f02ae19a34.zip
nios2: implement flush_dcache_mmap_lock/unlock
Use spin_lock/unlock_irq instead of doing nothing. This fixes corruptions of the vma_interval_tree causing the kernel to be stuck in an infinite loop in vma_interval_tree_foreach. Signed-off-by: Julien Beraud <julien.beraud@spectracom.orolia.com> Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
Diffstat (limited to 'arch/nios2/include/asm')
-rw-r--r--arch/nios2/include/asm/cacheflush.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/nios2/include/asm/cacheflush.h b/arch/nios2/include/asm/cacheflush.h
index 52abba973dc2..55e383c173f7 100644
--- a/arch/nios2/include/asm/cacheflush.h
+++ b/arch/nios2/include/asm/cacheflush.h
@@ -46,7 +46,9 @@ extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
extern void flush_dcache_range(unsigned long start, unsigned long end);
extern void invalidate_dcache_range(unsigned long start, unsigned long end);
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+#define flush_dcache_mmap_lock(mapping) \
+ spin_lock_irq(&(mapping)->tree_lock)
+#define flush_dcache_mmap_unlock(mapping) \
+ spin_unlock_irq(&(mapping)->tree_lock)
#endif /* _ASM_NIOS2_CACHEFLUSH_H */