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| author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2006-07-01 13:36:19 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-01 18:56:03 +0200 |
| commit | 47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9 (patch) | |
| tree | 4c71d9b03077f597bc627393ea24099b838a4db9 /arch/um/os-Linux/umid.c | |
| parent | [PATCH] SMP alternatives: skip with UP kernels (diff) | |
| download | linux-47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9.tar.xz linux-47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9.zip | |
[PATCH] uml: make copy_*_user atomic
Make __copy_*_user_inatomic really atomic to avoid "Sleeping function called in
atomic context" warnings, especially from futex code.
This is made by adding another kmap_atomic slot and making copy_*_user_skas
use kmap_atomic; also copy_*_user() becomes atomic, but that's true and is not
a problem for i386 (and we can always add might_sleep there as done
elsewhere). For TT mode kmap is not used, so there's no need for this.
I've had to use another slot since both KM_USER0 and KM_USER1 are used
elsewhere and could cause conflicts. Till now we reused the kmap_atomic slot
list from the subarch, but that's not needed as that list must contain the
common ones (used by generic code) + the ones used in architecture specific
code (and Uml till now used none); so I've taken the i386 one after comparing
it with ones from other archs, and added KM_UML_USERCOPY.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions