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| author | Helge Deller <deller@gmx.de> | 2023-05-24 18:07:07 +0300 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2023-05-24 20:03:49 +0300 |
| commit | 61e150fb310729c98227a5edf6e4a3619edc3702 (patch) | |
| tree | 7ebebb4ec2ba0d111c4d3a3bbf968f445d5291ea /arch/parisc/include | |
| parent | 6888ff04e37d01295620a73f3f7efbc79f6ef152 (diff) | |
| download | linux-61e150fb310729c98227a5edf6e4a3619edc3702.tar.xz | |
parisc: 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 parisc
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.
Cc: linux-parisc@vger.kernel.org
Cc: stable@kernel.org # 5.18+
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/include')
| -rw-r--r-- | arch/parisc/include/asm/cacheflush.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h index 0bdee6724132..c8b6928cee1e 100644 --- a/arch/parisc/include/asm/cacheflush.h +++ b/arch/parisc/include/asm/cacheflush.h @@ -48,6 +48,10 @@ void flush_dcache_page(struct page *page); #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) #define flush_icache_page(vma,page) do { \ flush_kernel_dcache_page_addr(page_address(page)); \ |