swapcache_prepare

Name:@entry: swap entry for which we allocate swap cache.* Called when allocating swap cache for existing swap entry,* This can return error codes. Returns 0 at success.* -EBUSY means there is a swap cache.* Note: return code is different from swap_duplicate().

Proto:int swapcache_prepare(swp_entry_t entry)

Type:int

Parameter:

Type	Parameter	Name
swp_entry_t	entry

3484

Return Verify that a swap entry is valid and increment its swap map count.* Returns error code in following case.* - success -> 0* - swp_entry is invalid -> EINVAL* - swp_entry is migration entry -> EINVAL

**Caller**
Name	Describe
__read_swap_cache_async

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion

Function report