The patch titled
pid namespaces: move alloc_pid() to copy_process()
has been removed from the -mm tree. Its filename was
pid-namespaces-move-alloc_pid-to-copy_process.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: pid namespaces: move alloc_pid() to copy_process()
From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxx>
Move alloc_pid() into copy_process(). This will keep all pid and pid
namespace code together and simplify error handling when we support multiple
pid namespaces.
Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxx>
Cc: Pavel Emelianov <xemul@xxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Cedric Le Goater <clg@xxxxxxxxxx>
Cc: Dave Hansen <haveblue@xxxxxxxxxx>
Cc: Serge Hallyn <serue@xxxxxxxxxx>
Cc: Herbert Poetzel <herbert@xxxxxxxxxxxx>
Cc: Kirill Korotaev <dev@xxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/fork.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff -puN kernel/fork.c~pid-namespaces-move-alloc_pid-to-copy_process kernel/fork.c
--- a/kernel/fork.c~pid-namespaces-move-alloc_pid-to-copy_process
+++ a/kernel/fork.c
@@ -1040,6 +1040,12 @@ static struct task_struct *copy_process(
if (p->binfmt && !try_module_get(p->binfmt->module))
goto bad_fork_cleanup_put_domain;
+ if (pid != &init_struct_pid) {
+ pid = alloc_pid();
+ if (!pid)
+ goto bad_fork_put_binfmt_module;
+ }
+
p->did_exec = 0;
delayacct_tsk_init(p); /* Must remain after dup_task_struct() */
copy_flags(clone_flags, p);
@@ -1331,6 +1337,9 @@ bad_fork_cleanup_cgroup:
cgroup_exit(p, cgroup_callbacks_done);
bad_fork_cleanup_delays_binfmt:
delayacct_tsk_free(p);
+ if (pid != &init_struct_pid)
+ free_pid(pid);
+bad_fork_put_binfmt_module:
if (p->binfmt)
module_put(p->binfmt->module);
bad_fork_cleanup_put_domain:
@@ -1395,19 +1404,16 @@ long do_fork(unsigned long clone_flags,
{
struct task_struct *p;
int trace = 0;
- struct pid *pid = alloc_pid();
long nr;
- if (!pid)
- return -EAGAIN;
- nr = pid->nr;
if (unlikely(current->ptrace)) {
trace = fork_traceflag (clone_flags);
if (trace)
clone_flags |= CLONE_PTRACE;
}
- p = copy_process(clone_flags, stack_start, regs, stack_size, parent_tidptr, child_tidptr, pid);
+ p = copy_process(clone_flags, stack_start, regs, stack_size,
+ parent_tidptr, child_tidptr, NULL);
/*
* Do this prior waking up the new thread - the thread pointer
* might get invalid after that point, if the thread exits quickly.
@@ -1415,6 +1421,8 @@ long do_fork(unsigned long clone_flags,
if (!IS_ERR(p)) {
struct completion vfork;
+ nr = pid_nr(task_pid(p));
+
if (clone_flags & CLONE_VFORK) {
p->vfork_done = &vfork;
init_completion(&vfork);
@@ -1448,7 +1456,6 @@ long do_fork(unsigned long clone_flags,
}
}
} else {
- free_pid(pid);
nr = PTR_ERR(p);
}
return nr;
_
Patches currently in -mm which might be from sukadev@xxxxxxxxxx are
origin.patch
-
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