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| author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2006-07-01 04:36:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-01 09:56:03 -0700 |
| commit | 47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9 (patch) | |
| tree | 4c71d9b03077f597bc627393ea24099b838a4db9 /include/asm-um | |
| parent | 8ec4d41f88872e6a5980558e362c0174dce54e40 (diff) | |
| download | linux-3.10-47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9.tar.gz linux-3.10-47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9.tar.bz2 linux-3.10-47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9.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 'include/asm-um')
| -rw-r--r-- | include/asm-um/kmap_types.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/asm-um/kmap_types.h b/include/asm-um/kmap_types.h index 0b22ad776e7..6c03acdb440 100644 --- a/include/asm-um/kmap_types.h +++ b/include/asm-um/kmap_types.h @@ -6,6 +6,24 @@ #ifndef __UM_KMAP_TYPES_H #define __UM_KMAP_TYPES_H -#include "asm/arch/kmap_types.h" +/* No more #include "asm/arch/kmap_types.h" ! */ + +enum km_type { + KM_BOUNCE_READ, + KM_SKB_SUNRPC_DATA, + KM_SKB_DATA_SOFTIRQ, + KM_USER0, + KM_USER1, + KM_UML_USERCOPY, /* UML specific, for copy_*_user - used in do_op_one_page */ + KM_BIO_SRC_IRQ, + KM_BIO_DST_IRQ, + KM_PTE0, + KM_PTE1, + KM_IRQ0, + KM_IRQ1, + KM_SOFTIRQ0, + KM_SOFTIRQ1, + KM_TYPE_NR +}; #endif |