path: root/drivers
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authorZachary Amsden <zach@vmware.com>2007-04-08 16:04:01 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-04-08 19:47:55 -0700
commit49f19710512c825aaea73b9207b3a848027cda1d (patch)
tree06da31bd9a84273e12aa43f536f90eb8146ff92e /drivers
parent[PATCH] fuse: validate rootmode mount option (diff)
[PATCH] Proper fix for highmem kmap_atomic functions for VMI for 2.6.21
Since lazy MMU batching mode still allows interrupts to enter, it is possible for interrupt handlers to try to use kmap_atomic, which fails when lazy mode is active, since the PTE update to highmem will be delayed. The best workaround is to issue an explicit flush in kmap_atomic_functions case; this is the only way nested PTE updates can happen in the interrupt handler. Thanks to Jeremy Fitzhardinge for noting the bug and suggestions on a fix. This patch gets reverted again when we start 2.6.22 and the bug gets fixed differently. Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: Andi Kleen <ak@muc.de> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
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