函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:lib\xarray.c Create Date:2022-07-27 07:10:48
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：xa_load() - Load an entry from an XArray.*@xa: XArray.*@index: index into array.* Context: Any context. Takes and releases the RCU lock.* Return: The entry at @index in @xa.

函数原型：void *xa_load(struct xarray *xa, unsigned long index)

返回类型：void

参数：

类型参数名称
struct xarray *xa
unsigned longindex
1298  XA_STATE() - Declare an XArray operation state.*@name: Name of this operation state (usually xas).*@array: Array to operate on.*@index: Initial index of interest.* Declare and initialise an xa_state on the stack.(xas, xa, index)
1301  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
1302  循环
1303  entry等于xas_load() - Load an entry from the XArray (advanced).*@xas: XArray operation state.* Usually walks the @xas to the appropriate state to load the entry* stored at xa_index. However, it will do nothing and return %NULL if*@xas is in an error state
1304  如果xa_is_zero() - Is the entry a zero entry?*@entry: Entry retrieved from the XArray* The normal API will return NULL as the contents of a slot containing* a zero entry. You can only see zero entries by using the advanced API.则entry = NULL
1306  当xas_retry() - Retry the operation if appropriate.*@xas: XArray operation state.*@entry: Entry from xarray.* The advanced functions may sometimes return an internal entry, such as* a retry entry or a zero entry. This function sets up the @xas to restart循环
1307  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
1309  返回:entry
调用者
名称描述
xa_erase_index
check_xa_load
check_xa_shrink
check_insert
check_reserve
check_multi_store_1
check_multi_store
__check_store_iter
check_find_entry
__check_store_range
syscall_nr_to_meta
__do_page_cache_readahead__do_page_cache_readahead() actually reads a chunk of disk. It allocates* the pages first, then submits them for I/O. This avoids the very bad* behaviour which would occur if page allocations are causing VM writeback.
ib_get_client_data_get_client_data - Get IB client context*@device:Device to get context for*@client:Client to get context for* ib_get_client_data() returns the client context data set with* ib_set_client_data()