diff options
| author | Helge Deller <deller@gmx.de> | 2023-08-22 17:27:49 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-25 02:20:31 +0300 |
| commit | 7db15418d390cf878d7c77ae08a4ad39f1534bc5 (patch) | |
| tree | 89c0d1cdfd00afdb004e131d62b03fd86480d310 /arch/nios2/include/asm | |
| parent | 8cfd014efd93e9450fcd4892bbfe8b10f41e53c3 (diff) | |
| download | linux-7db15418d390cf878d7c77ae08a4ad39f1534bc5.tar.xz | |
nios2: fix flush_dcache_page() for usage from irq context
Since at least kernel 6.1, flush_dcache_page() is called with IRQs
disabled, e.g. from aio_complete().
But the current implementation for flush_dcache_page() on NIOS2
unintentionally re-enables IRQs, which may lead to deadlocks.
Fix it by using xa_lock_irqsave() and xa_unlock_irqrestore() for the
flush_dcache_mmap_*lock() macros instead.
Link: https://lkml.kernel.org/r/ZOTF5WWURQNH9+iw@p100
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/nios2/include/asm')
| -rw-r--r-- | arch/nios2/include/asm/cacheflush.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/cacheflush.h b/arch/nios2/include/asm/cacheflush.h index 7c48c5213fb7..348cea097792 100644 --- a/arch/nios2/include/asm/cacheflush.h +++ b/arch/nios2/include/asm/cacheflush.h @@ -52,5 +52,9 @@ extern void invalidate_dcache_range(unsigned long start, unsigned long end); #define flush_dcache_mmap_lock(mapping) xa_lock_irq(&mapping->i_pages) #define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages) +#define flush_dcache_mmap_lock_irqsave(mapping, flags) \ + xa_lock_irqsave(&mapping->i_pages, flags) +#define flush_dcache_mmap_unlock_irqrestore(mapping, flags) \ + xa_unlock_irqrestore(&mapping->i_pages, flags) #endif /* _ASM_NIOS2_CACHEFLUSH_H */ |