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authorDaniel Axtens <dja@axtens.net>2019-08-20 12:49:40 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2019-11-07 13:15:39 +1100
commit81d2c6f81996e01fbcd2b5aeefbb519e21c806e9 (patch)
tree33c5485ffb75626553956021e777a02c34e8d991 /Documentation/core-api
parentda0c9ea146cbe92b832f1b0f694840ea8eb33cce (diff)
kasan: support instrumented bitops combined with generic bitops
Currently bitops-instrumented.h assumes that the architecture provides atomic, non-atomic and locking bitops (e.g. both set_bit and __set_bit). This is true on x86 and s390, but is not always true: there is a generic bitops/non-atomic.h header that provides generic non-atomic operations, and also a generic bitops/lock.h for locking operations. powerpc uses the generic non-atomic version, so it does not have it's own e.g. __set_bit that could be renamed arch___set_bit. Split up bitops-instrumented.h to mirror the atomic/non-atomic/lock split. This allows arches to only include the headers where they have arch-specific versions to rename. Update x86 and s390. (The generic operations are automatically instrumented because they're written in C, not asm.) Suggested-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Daniel Axtens <dja@axtens.net> Acked-by: Marco Elver <elver@google.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190820024941.12640-1-dja@axtens.net
Diffstat (limited to 'Documentation/core-api')
-rw-r--r--Documentation/core-api/kernel-api.rst17
1 files changed, 16 insertions, 1 deletions
diff --git a/Documentation/core-api/kernel-api.rst b/Documentation/core-api/kernel-api.rst
index f77de49b1d51..2caaeb55e8dd 100644
--- a/Documentation/core-api/kernel-api.rst
+++ b/Documentation/core-api/kernel-api.rst
@@ -57,7 +57,22 @@ The Linux kernel provides more basic utility functions.
Bit Operations
--------------
-.. kernel-doc:: include/asm-generic/bitops-instrumented.h
+Atomic Operations
+~~~~~~~~~~~~~~~~~
+
+.. kernel-doc:: include/asm-generic/bitops/instrumented-atomic.h
+ :internal:
+
+Non-atomic Operations
+~~~~~~~~~~~~~~~~~~~~~
+
+.. kernel-doc:: include/asm-generic/bitops/instrumented-non-atomic.h
+ :internal:
+
+Locking Operations
+~~~~~~~~~~~~~~~~~~
+
+.. kernel-doc:: include/asm-generic/bitops/instrumented-lock.h
:internal:
Bitmap Operations