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author | Ilya Loginov <isloginov@gmail.com> | 2009-11-26 09:16:19 +0100 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2009-11-26 09:16:19 +0100 |
commit | 2d4dc890b5c8fabd818a8586607e6843c4375e62 (patch) | |
tree | 9976ed7b0eed0056f8289aeb6a2b0abf8c940454 /firmware/tr_smctr.bin.ihex | |
parent | 3586e917f2c7df769d173c4ec99554cb40a911e5 (diff) | |
download | linux-2d4dc890b5c8fabd818a8586607e6843c4375e62.tar.gz |
block: add helpers to run flush_dcache_page() against a bio and a request's pages
Mtdblock driver doesn't call flush_dcache_page for pages in request. So, this causes problems on architectures where the icache doesn't fill from the dcache or with dcache aliases. The patch fixes this. The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid pointless empty cache-thrashing loops on architectures for which flush_dcache_page() is a no-op. Every architecture was provided with this flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is equal 1 or do nothing otherwise. See "fix mtd_blkdevs problem with caches on some architectures" discussion on LKML for more information. Signed-off-by: Ilya Loginov <isloginov@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Peter Horton <phorton@bitbox.co.uk> Cc: "Ed L. Cashin" <ecashin@coraid.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'firmware/tr_smctr.bin.ihex')
0 files changed, 0 insertions, 0 deletions