xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cgroup files: convert res_counter_write() to be a cgroups write_string() handler

Browse Source 
Currently res_counter_write() is a raw file handler even though it's
ultimately taking a number, since in some cases it wants to
pre-process the string when converting it to a number.

This patch converts res_counter_write() from a raw file handler to a
write_string() handler; this allows some of the boilerplate
copying/locking/checking to be removed, and simplies the cleanup path,
since these functions are now performed by the cgroups framework.

[lizf@cn.fujitsu.com: build fix]
Signed-off-by: Paul Menage <menage@google.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Paul Menage
2008-07-25 01:47:04 -07:00
committed by Linus Torvalds
parent f92523e3a7
commit 856c13aa1f
3 changed files with 34 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
include/linux/res_counter.h
View File

@@ -63,9 +63,14 @@ u64 res_counter_read_u64(struct res_counter *counter, int member);
ssize_t res_counter_read(struct res_counter *counter, int member,
const char __user *buf, size_t nbytes, loff_t *pos,
int (*read_strategy)(unsigned long long val, char *s));
ssize_t res_counter_write(struct res_counter *counter, int member,
const char __user *buf, size_t nbytes, loff_t *pos,
int (*write_strategy)(char *buf, unsigned long long *val));
typedef int (*write_strategy_fn)(const char *buf, unsigned long long *val);
int res_counter_memparse_write_strategy(const char *buf,
unsigned long long *res);
int res_counter_write(struct res_counter *counter, int member,
const char *buffer, write_strategy_fn write_strategy);
/*
* the field descriptors. one for each member of res_counter