test_and_clear

函数名称：st_and_clear_bit - Clear a bit and return its old value*@nr: Bit to clear*@addr: Address to count from* This is an atomic fully-ordered operation (implied full memory barrier).

函数原型：static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr)

返回类型：bool

参数：

类型	参数	名称
long	nr
volatile unsigned long *	addr

**调用者**
名称	描述
kasan_bitops
mce_notify_irq	Notify the user(s) about new machine check events.* Can be called from interrupt context, but not from machine check/NMI* context.
tasklet_action_common
irq_wait_for_interrupt
irq_thread_dtor
irq_matrix_assign_system	q_matrix_assign_system - Assign system wide entry in the matrix@m: Matrix pointer@bit: Which bit to reserve@replace: Replace an already allocated vector with a system vector at the same bit position.* The BUG_ON()s below are on purpose
tick_check_oneshot_change	Check, if a change happened, which makes oneshot possible.* Called cyclic from the hrtimer softirq (driven by the timer* softirq) allow_nohz signals, that we can switch into low-res nohz* mode, because high resolution timers are disabled (either compile
find_active_uprobe
filemap_check_errors
wb_shutdown	Remove bdi from the global list and shutdown any threads we have running
clear_wb_congested
vm_unlock_mapping
page_alloc_shuffle	Depending on the architecture, module parameter parsing may run* before, or after the cache detection
do_compact_page
__blk_mq_tag_idle	If a previously busy queue goes inactive, potential waiters could now* be allowed to queue. Wake them up and check.
__blk_req_zone_write_unlock
key_garbage_collector	Reaper for unused keys.
__key_instantiate_and_link	Instantiate a key and link it into the target keyring atomically. Must be* called with the target keyring's semaphore writelocked. The target key's* semaphore need not be locked as instantiation is serialised by* key_construction_mutex.
key_reject_and_link	key_reject_and_link - Negatively instantiate a key and link it into the keyring.@key: The key to instantiate.@timeout: The timeout on the negative key.*@error: The error to return when the key is hit.
ima_check_last_writer
process_measurement
clear_dquot_dirty
test_and_clear_bit_le
cpumask_test_and_clear_cpu	自动测试并清空CPU信息
test_and_clear_ti_thread_flag
TestClearPageError
TestClearPageReferenced
TestClearPageDirty
TestClearPageActive
TestClearPageWorkingset
TestClearPagePinned
TestClearPageXenRemapped
TestClearPagePrivate2
TestClearPageOwnerPriv1
TestClearPageWriteback
TestClearPageReclaim
TestClearPageReadahead
TestClearPageUnevictable
TestClearPageMlocked
TestClearPageHWPoison
TestClearPageDoubleMap
netif_dormant_off	设置设备为不休眠
xprt_test_and_clear_connected
test_clear_buffer_dirty
test_clear_buffer_req
test_and_clear_page_young

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