diff options
authorPavel Emelyanov <xemul@openvz.org>2007-10-18 23:40:19 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:41 -0700
commit8990571eb573032c1192440febb17132074c5575 (patch)
parentbac0abd6174e427404dd197cdbefece31e97329b (diff)
Uninline find_pid etc set of functions
The find_pid/_vpid/_pid_ns functions are used to find the struct pid by its id, depending on whic id - global or virtual - is used. The find_vpid() is a macro that pushes the current->nsproxy->pid_ns on the stack to call another function - find_pid_ns(). It turned out, that this dereference together with the push itself cause the kernel text size to grow too much. Move all these out-of-line. Together with the previous patch this saves a bit less that 400 bytes from .text section. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Paul Menage <menage@google.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 files changed, 15 insertions, 4 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 4817c6671e7..e29a900a849 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -110,9 +110,8 @@ extern struct pid_namespace init_pid_ns;
* see also find_task_by_pid() set in include/linux/sched.h
extern struct pid *FASTCALL(find_pid_ns(int nr, struct pid_namespace *ns));
-#define find_vpid(pid) find_pid_ns(pid, current->nsproxy->pid_ns)
-#define find_pid(pid) find_pid_ns(pid, &init_pid_ns)
+extern struct pid *find_vpid(int nr);
+extern struct pid *find_pid(int nr);
* Lookup a PID in the hash table, and return with it's count elevated.
diff --git a/kernel/capability.c b/kernel/capability.c
index 0d0d886d1e8..efbd9cdce13 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -96,7 +96,7 @@ static inline int cap_set_pg(int pgrp_nr, kernel_cap_t *effective,
int found = 0;
struct pid *pgrp;
- pgrp = find_pid_ns(pgrp_nr, current->nsproxy->pid_ns);
+ pgrp = find_vpid(pgrp_nr);
do_each_pid_task(pgrp, PIDTYPE_PGID, g) {
target = g;
while_each_thread(g, target) {
diff --git a/kernel/pid.c b/kernel/pid.c
index bed9e7f80a5..8040533d1a0 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -302,6 +302,18 @@ struct pid * fastcall find_pid_ns(int nr, struct pid_namespace *ns)
+struct pid *find_vpid(int nr)
+ return find_pid_ns(nr, current->nsproxy->pid_ns);
+struct pid *find_pid(int nr)
+ return find_pid_ns(nr, &init_pid_ns);
* attach_pid() must be called with the tasklist_lock write-held.