down_write_killable

函数名称：lock for writing

函数原型：int __sched down_write_killable(struct rw_semaphore *sem)

返回类型：int

参数：

类型	参数	名称
struct rw_semaphore *	sem

**调用者**
名称	描述
SYSCALL_DEFINE5
xol_add_vma	Slot allocation for XOL
do_mlock
SYSCALL_DEFINE2
SYSCALL_DEFINE1
sys_munlockall
SYSCALL_DEFINE1
__vm_munmap
SYSCALL_DEFINE5	Emulation of deprecated remap_file_pages() syscall.
vm_brk_flags
do_mprotect_pkey	pkey==-1 when doing a legacy mprotect()
SYSCALL_DEFINE5	Expand (or shrink) an existing mapping, potentially moving it at the* same time (controlled by the MREMAP_MAYMOVE flag and available VM space)* MREMAP_FIXED option added 5-Dec-1999 by Benjamin LaHaise* This option implies MREMAP_MAYMOVE.
SYSCALL_DEFINE3	The madvise(2) system call
ksys_shmdt	detach and kill segment if marked destroyed.* The work is done in shm_close.
setup_arg_pages	Finalizes the stack vm_area_struct. The flags and permissions are updated,* the stack is optionally relocated, and some extra space is added.
iterate_dir
aio_setup_ring
coredump_wait
write_ldt
dup_mmap
vm_mmap_pgoff
do_shmat	Fix shmaddr, allocate descriptor, map shm, add attach descriptor to lists.* NOTE! Despite the name, this is NOT a direct system call entrypoint. The* "raddr" thing points to kernel space, and there has to be a wrapper around* this.
__bprm_mm_init

函数逻辑报告