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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-28 00:14:30 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-28 00:14:30 +0300 |
| commit | bc6cb4d5bc3a44197de30784eae71d8ba28483eb (patch) | |
| tree | fdd00391c6068c217eeb8a4a06afc40cc1fc6853 /Documentation/core-api | |
| parent | ed3b7923a816ded62dccef377c9ee346c7d3b1b4 (diff) | |
| parent | b33eb50a92b0a298fa8a6ac350e741c3ec100f6d (diff) | |
| download | linux-bc6cb4d5bc3a44197de30784eae71d8ba28483eb.tar.xz | |
Merge tag 'locking-core-2023-06-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
- Introduce cmpxchg128() -- aka. the demise of cmpxchg_double()
The cmpxchg128() family of functions is basically & functionally the
same as cmpxchg_double(), but with a saner interface.
Instead of a 6-parameter horror that forced u128 - u64/u64-halves
layout details on the interface and exposed users to complexity,
fragility & bugs, use a natural 3-parameter interface with u128
types.
- Restructure the generated atomic headers, and add kerneldoc comments
for all of the generic atomic{,64,_long}_t operations.
The generated definitions are much cleaner now, and come with
documentation.
- Implement lock_set_cmp_fn() on lockdep, for defining an ordering when
taking multiple locks of the same type.
This gets rid of one use of lockdep_set_novalidate_class() in the
bcache code.
- Fix raw_cpu_generic_try_cmpxchg() bug due to an unintended variable
shadowing generating garbage code on Clang on certain ARM builds.
* tag 'locking-core-2023-06-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits)
locking/atomic: scripts: fix ${atomic}_dec_if_positive() kerneldoc
percpu: Fix self-assignment of __old in raw_cpu_generic_try_cmpxchg()
locking/atomic: treewide: delete arch_atomic_*() kerneldoc
locking/atomic: docs: Add atomic operations to the driver basic API documentation
locking/atomic: scripts: generate kerneldoc comments
docs: scripts: kernel-doc: accept bitwise negation like ~@var
locking/atomic: scripts: simplify raw_atomic*() definitions
locking/atomic: scripts: simplify raw_atomic_long*() definitions
locking/atomic: scripts: split pfx/name/sfx/order
locking/atomic: scripts: restructure fallback ifdeffery
locking/atomic: scripts: build raw_atomic_long*() directly
locking/atomic: treewide: use raw_atomic*_<op>()
locking/atomic: scripts: add trivial raw_atomic*_<op>()
locking/atomic: scripts: factor out order template generation
locking/atomic: scripts: remove leftover "${mult}"
locking/atomic: scripts: remove bogus order parameter
locking/atomic: xtensa: add preprocessor symbols
locking/atomic: x86: add preprocessor symbols
locking/atomic: sparc: add preprocessor symbols
locking/atomic: sh: add preprocessor symbols
...
Diffstat (limited to 'Documentation/core-api')
| -rw-r--r-- | Documentation/core-api/this_cpu_ops.rst | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/Documentation/core-api/this_cpu_ops.rst b/Documentation/core-api/this_cpu_ops.rst index 5cb8b883ae83..91acbcf30e9b 100644 --- a/Documentation/core-api/this_cpu_ops.rst +++ b/Documentation/core-api/this_cpu_ops.rst @@ -53,7 +53,6 @@ preemption and interrupts:: this_cpu_add_return(pcp, val) this_cpu_xchg(pcp, nval) this_cpu_cmpxchg(pcp, oval, nval) - this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) this_cpu_sub(pcp, val) this_cpu_inc(pcp) this_cpu_dec(pcp) @@ -242,7 +241,6 @@ safe:: __this_cpu_add_return(pcp, val) __this_cpu_xchg(pcp, nval) __this_cpu_cmpxchg(pcp, oval, nval) - __this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) __this_cpu_sub(pcp, val) __this_cpu_inc(pcp) __this_cpu_dec(pcp) |