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from c0b9620bc3f0 Merge tag 'rcu.next.v6.10' of https://github.com/urezki/linux new 2f528020a290 sparc32: make __cmpxchg_u32() return u32 new b7e2a6389e14 sparc32: make the first argument of __cmpxchg_u64() volati [...] new d7b52b48f006 sparc32: unify __cmpxchg_u{32,64} new dbc93fdcdc0d sparc32: add __cmpxchg_u{8,16}() and teach __cmpxchg() to [...] new 29b8e53c1274 parisc: __cmpxchg_u32(): lift conversion into the callers new 7e00072915b3 parisc: unify implementations of __cmpxchg_u{8,32,64} new c57e5dccb06d parisc: add missing export of __cmpxchg_u8() new d428032b3524 parisc: add u16 support to cmpxchg() new a88d970c8bb5 lib: Add one-byte emulation function new 5800e77d88c0 csky: Emulate one-byte cmpxchg new 2e57d1d6062a Merge tag 'cmpxchg.2024.05.11a' of git://git.kernel.org/pu [...] new d2c470c49171 Documentation/litmus-tests: Add locking tests to README new 293f5bc2717b Documentation/litmus-tests: Demonstrate unordered failing cmpxchg new d372e20433cb Documentation/atomic_t: Emphasize that failed atomic opera [...] new 2ba5b4130e3d Documentation/litmus-tests: Make cmpxchg() tests safe for klitmus new ee2026013609 Merge tag 'lkmm.2024.05.10a' of git://git.kernel.org/pub/s [...] new 31f605a308e6 kcsan, compiler_types: Introduce __data_racy type qualifier new c07ea940a011 Merge tag 'kcsan.2024.05.10a' of git://git.kernel.org/pub/ [...]

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Summary of changes: Documentation/atomic_t.txt | 4 +- Documentation/dev-tools/kcsan.rst | 10 +++++ Documentation/litmus-tests/README | 45 +++++++++++++++++++ .../atomic/cmpxchg-fail-ordered-1.litmus | 35 +++++++++++++++ .../atomic/cmpxchg-fail-ordered-2.litmus | 30 +++++++++++++ .../atomic/cmpxchg-fail-unordered-1.litmus | 34 ++++++++++++++ .../atomic/cmpxchg-fail-unordered-2.litmus | 30 +++++++++++++ arch/Kconfig | 3 ++ arch/csky/Kconfig | 1 + arch/csky/include/asm/cmpxchg.h | 10 +++++ arch/parisc/include/asm/cmpxchg.h | 22 +++++---- arch/parisc/kernel/parisc_ksyms.c | 2 + arch/parisc/lib/bitops.c | 52 +++++++--------------- arch/sparc/include/asm/cmpxchg_32.h | 20 ++++----- arch/sparc/lib/atomic32.c | 45 +++++++++---------- include/linux/cmpxchg-emu.h | 15 +++++++ include/linux/compiler_types.h | 7 +++ kernel/kcsan/kcsan_test.c | 17 +++++++ lib/Makefile | 1 + lib/cmpxchg-emu.c | 45 +++++++++++++++++++ 20 files changed, 343 insertions(+), 85 deletions(-) create mode 100644 Documentation/litmus-tests/atomic/cmpxchg-fail-ordered-1.litmus create mode 100644 Documentation/litmus-tests/atomic/cmpxchg-fail-ordered-2.litmus create mode 100644 Documentation/litmus-tests/atomic/cmpxchg-fail-unordered-1.litmus create mode 100644 Documentation/litmus-tests/atomic/cmpxchg-fail-unordered-2.litmus create mode 100644 include/linux/cmpxchg-emu.h create mode 100644 lib/cmpxchg-emu.c