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e4ab322f |
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17-Sep-2023 |
Peter Zijlstra <peterz@infradead.org> |
cleanup: Add conditional guard support Adds: - DEFINE_GUARD_COND() / DEFINE_LOCK_GUARD_1_COND() to extend existing guards with conditional lock primitives, eg. mutex_trylock(), mutex_lock_interruptible(). nb. both primitives allow NULL 'locks', which cause the lock to fail (obviously). - extends scoped_guard() to not take the body when the the conditional guard 'fails'. eg. scoped_guard (mutex_intr, &task->signal_cred_guard_mutex) { ... } will only execute the body when the mutex is held. - provides scoped_cond_guard(name, fail, args...); which extends scoped_guard() to do fail when the lock-acquire fails. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20231102110706.460851167%40infradead.org
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85be6d84 |
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14-Aug-2023 |
Peter Zijlstra <peterz@infradead.org> |
cleanup: Make no_free_ptr() __must_check recent discussion brought about the realization that it makes sense for no_free_ptr() to have __must_check semantics in order to avoid leaking the resource. Additionally, add a few comments to clarify why/how things work. All credit to Linus on how to combine __must_check and the stmt-expression. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20230816103102.GF980931@hirez.programming.kicks-ass.net
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