Revision 8dad53a11f8d94dceb540a5f8f153484f42be84b authored by Christoph Hellwig on 23 July 2021, 22:50:17 UTC, committed by Linus Torvalds on 24 July 2021, 00:43:28 UTC
memcpy_to_page and memzero_page can write to arbitrary pages, which could be in the page cache or in high memory, so call flush_kernel_dcache_pages to flush the dcache. This is a problem when using these helpers on dcache challeneged architectures. Right now there are just a few users, chances are no one used the PC floppy driver, the aha1542 driver for an ISA SCSI HBA, and a few advanced and optional btrfs and ext4 features on those platforms yet since the conversion. Link: https://lkml.kernel.org/r/20210713055231.137602-2-hch@lst.de Fixes: bb90d4bc7b6a ("mm/highmem: Lift memcpy_[to|from]_page to core") Fixes: 28961998f858 ("iov_iter: lift memzero_page() to highmem.h") Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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File | Mode | Size |
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Documentation | ||
include | ||
tests | ||
Build | -rw-r--r-- | 309 bytes |
Makefile | -rw-r--r-- | 5.4 KB |
core.c | -rw-r--r-- | 792 bytes |
cpumap.c | -rw-r--r-- | 6.9 KB |
evlist.c | -rw-r--r-- | 15.4 KB |
evsel.c | -rw-r--r-- | 8.6 KB |
internal.h | -rw-r--r-- | 851 bytes |
lib.c | -rw-r--r-- | 902 bytes |
libperf.map | -rw-r--r-- | 1.1 KB |
libperf.pc.template | -rw-r--r-- | 225 bytes |
mmap.c | -rw-r--r-- | 8.1 KB |
threadmap.c | -rw-r--r-- | 2.0 KB |
xyarray.c | -rw-r--r-- | 656 bytes |
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