include/linux/rwsem.h:273 class_rwsem_write_try_constructor() warn: passing zero to 'ERR_PTR'

BCC: [email protected]
CC: [email protected]
CC: [email protected]
TO: Marco Elver <[email protected]>
CC: Peter Zijlstra <[email protected]>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bcc44b6785f216eb939226ade6e3910baa30516b
commit: e4fd3be884cf33a42c5bcde087b0722a5b8f25ca locking/rwsem: Support Clang's context analysis
date:   7 months ago
:::::: branch date: 35 minutes ago
:::::: commit date: 7 months ago
config: openrisc-randconfig-r073-20260807 (https://download.01.org/0day-ci/archive/20260808/[email protected]/config)
compiler: or1k-linux-gcc (GCC) 10.5.0
smatch: v0.5.0-9187-g5189e3fb

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: e4fd3be884cf ("locking/rwsem: Support Clang's context analysis")
| Reported-by: kernel test robot <[email protected]>
| Reported-by: Dan Carpenter <[email protected]>
| Closes: https://lore.kernel.org/r/[email protected]/

New smatch warnings:
include/linux/rwsem.h:273 class_rwsem_write_try_constructor() warn: passing zero to 'ERR_PTR'

Old smatch warnings:
lib/test_context-analysis.c:96 test_raw_spinlock_trylock_extra() warn: mixing irq and irqsave
include/linux/spinlock.h:556 class_raw_spinlock_try_constructor() warn: passing zero to 'ERR_PTR'
lib/test_context-analysis.c:120 test_spinlock_trylock_extra() warn: mixing irq and irqsave
include/linux/spinlock.h:604 class_spinlock_try_constructor() warn: passing zero to 'ERR_PTR'
include/linux/mutex.h:255 class_mutex_try_constructor() warn: passing zero to 'ERR_PTR'
include/linux/rwsem.h:262 class_rwsem_read_try_constructor() warn: passing zero to 'ERR_PTR'

vim +/ERR_PTR +273 include/linux/rwsem.h

e4fd3be884cf33 Marco Elver 2025-12-19  271  
e4fd3be884cf33 Marco Elver 2025-12-19  272  DEFINE_LOCK_GUARD_1(rwsem_write, struct rw_semaphore, down_write(_T->lock), up_write(_T->lock))
e4fd3be884cf33 Marco Elver 2025-12-19 @273  DEFINE_LOCK_GUARD_1_COND(rwsem_write, _try, down_write_trylock(_T->lock))
e4fd3be884cf33 Marco Elver 2025-12-19  274  DEFINE_LOCK_GUARD_1_COND(rwsem_write, _kill, down_write_killable(_T->lock), _RET == 0)
e4fd3be884cf33 Marco Elver 2025-12-19  275  

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