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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2006-07-01 04:36:19 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-01 09:56:03 -0700
commit47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9 (patch)
tree4c71d9b03077f597bc627393ea24099b838a4db9 /include/asm-um
parent8ec4d41f88872e6a5980558e362c0174dce54e40 (diff)
downloadlinux-2.6.34-ux500-47e5243afe0bd2a1aca1e1f05dfbcc214267fbc9.tar.gz
[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.h20
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