The patch titled
gfs2: make gfs2_holder.gh_owner_pid be a struct pid *
has been added to the -mm tree. Its filename is
gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid.patch
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------------------------------------------------------
Subject: gfs2: make gfs2_holder.gh_owner_pid be a struct pid *
From: Pavel Emelyanov <xemul@xxxxxxxxxx>
The gl_owner_pid field is used to get the holder task by its pid and check
whether the current is a holder, so make it in a proper manner, i.e. via the
struct pid * manipulations.
Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Steven Whitehouse <swhiteho@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/gfs2/glock.c | 18 +++++++++++-------
fs/gfs2/glock.h | 4 +++-
fs/gfs2/incore.h | 2 +-
3 files changed, 15 insertions(+), 9 deletions(-)
diff -puN fs/gfs2/glock.c~gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid fs/gfs2/glock.c
--- a/fs/gfs2/glock.c~gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid
+++ a/fs/gfs2/glock.c
@@ -399,7 +399,7 @@ void gfs2_holder_init(struct gfs2_glock
INIT_LIST_HEAD(&gh->gh_list);
gh->gh_gl = gl;
gh->gh_ip = (unsigned long)__builtin_return_address(0);
- gh->gh_owner_pid = current->pid;
+ gh->gh_owner_pid = get_pid(task_pid(current));
gh->gh_state = state;
gh->gh_flags = flags;
gh->gh_error = 0;
@@ -433,6 +433,7 @@ void gfs2_holder_reinit(unsigned int sta
void gfs2_holder_uninit(struct gfs2_holder *gh)
{
+ put_pid(gh->gh_owner_pid);
gfs2_glock_put(gh->gh_gl);
gh->gh_gl = NULL;
gh->gh_ip = 0;
@@ -1050,7 +1051,7 @@ static int glock_wait_internal(struct gf
}
static inline struct gfs2_holder *
-find_holder_by_owner(struct list_head *head, pid_t pid)
+find_holder_by_owner(struct list_head *head, struct pid *pid)
{
struct gfs2_holder *gh;
@@ -1087,7 +1088,7 @@ static void add_to_queue(struct gfs2_hol
struct gfs2_glock *gl = gh->gh_gl;
struct gfs2_holder *existing;
- BUG_ON(!gh->gh_owner_pid);
+ BUG_ON(gh->gh_owner_pid == NULL);
if (test_and_set_bit(HIF_WAIT, &gh->gh_iflags))
BUG();
@@ -1097,12 +1098,14 @@ static void add_to_queue(struct gfs2_hol
if (existing) {
print_symbol(KERN_WARNING "original: %s\n",
existing->gh_ip);
- printk(KERN_INFO "pid : %d\n", existing->gh_owner_pid);
+ printk(KERN_INFO "pid : %d\n",
+ pid_nr(existing->gh_owner_pid));
printk(KERN_INFO "lock type : %d lock state : %d\n",
existing->gh_gl->gl_name.ln_type,
existing->gh_gl->gl_state);
print_symbol(KERN_WARNING "new: %s\n", gh->gh_ip);
- printk(KERN_INFO "pid : %d\n", gh->gh_owner_pid);
+ printk(KERN_INFO "pid : %d\n",
+ pid_nr(gh->gh_owner_pid));
printk(KERN_INFO "lock type : %d lock state : %d\n",
gl->gl_name.ln_type, gl->gl_state);
BUG();
@@ -1803,8 +1806,9 @@ static int dump_holder(struct glock_iter
print_dbg(gi, " %s\n", str);
if (gh->gh_owner_pid) {
- print_dbg(gi, " owner = %ld ", (long)gh->gh_owner_pid);
- gh_owner = find_task_by_pid(gh->gh_owner_pid);
+ print_dbg(gi, " owner = %ld ",
+ (long)pid_nr(gh->gh_owner_pid));
+ gh_owner = pid_task(gh->gh_owner_pid, PIDTYPE_PID);
if (gh_owner)
print_dbg(gi, "(%s)\n", gh_owner->comm);
else
diff -puN fs/gfs2/glock.h~gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid fs/gfs2/glock.h
--- a/fs/gfs2/glock.h~gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid
+++ a/fs/gfs2/glock.h
@@ -36,11 +36,13 @@ static inline int gfs2_glock_is_locked_b
{
struct gfs2_holder *gh;
int locked = 0;
+ struct pid *pid;
/* Look in glock's list of holders for one with current task as owner */
spin_lock(&gl->gl_spin);
+ pid = task_pid(current);
list_for_each_entry(gh, &gl->gl_holders, gh_list) {
- if (gh->gh_owner_pid == current->pid) {
+ if (gh->gh_owner_pid == pid) {
locked = 1;
break;
}
diff -puN fs/gfs2/incore.h~gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid fs/gfs2/incore.h
--- a/fs/gfs2/incore.h~gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid
+++ a/fs/gfs2/incore.h
@@ -151,7 +151,7 @@ struct gfs2_holder {
struct list_head gh_list;
struct gfs2_glock *gh_gl;
- pid_t gh_owner_pid;
+ struct pid *gh_owner_pid;
unsigned int gh_state;
unsigned gh_flags;
_
Patches currently in -mm which might be from xemul@xxxxxxxxxx are
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git-net.patch
shmem-factor-out-sbi-free_inodes-manipulations.patch
shmem-factor-out-sbi-free_inodes-manipulations-fix.patch
memory-controller-add-documentation.patch
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memory-controller-containers-setup-v7.patch
memory-controller-accounting-setup-v7.patch
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memory-controller-task-migration-v7.patch
memory-controller-add-per-container-lru-and-reclaim-v7.patch
memory-controller-improve-user-interface.patch
memory-controller-oom-handling-v7.patch
memory-controller-add-switch-to-control-what-type-of-pages-to-limit-v7.patch
memory-controller-make-page_referenced-container-aware-v7.patch
memory-controller-make-charging-gfp-mask-aware.patch
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bugfix-for-memory-cgroup-controller-fix-error-handling-path-in-mem_charge_cgroup.patch
bugfix-for-memory-controller-add-helper-function-for-assigning-cgroup-to-page.patch
bugfix-for-memory-cgroup-controller-migration-under-memory-controller-fix.patch
bugfix-for-memory-cgroup-controller-avoid-pagelru-page-in-mem_cgroup_isolate_pages.patch
bugfix-for-memory-cgroup-controller-avoid-pagelru-page-in-mem_cgroup_isolate_pages-fix.patch
memcgroup-fix-zone-isolation-oom.patch
memcgroup-revert-swap_state-mods.patch
memory-cgroup-enhancements-fix-zone-handling-in-try_to_free_mem_cgroup_page.patch
memory-cgroup-enhancements-force_empty-interface-for-dropping-all-account-in-empty-cgroup.patch
memory-cgroup-enhancements-remember-a-page-is-charged-as-page-cache.patch
memory-cgroup-enhancements-remember-a-page-is-on-active-list-of-cgroup-or-not.patch
memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup.patch
memory-cgroup-enhancements-add-memorystat-file.patch
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per-zone-and-reclaim-enhancements-for-memory-controller-take-3-per-zone-active-inactive-counter.patch
per-zone-and-reclaim-enhancements-for-memory-controller-take-3-calculate-mapper_ratio-per-cgroup.patch
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handle-pid-namespaces-in-cgroups-code.patch
gfs2-make-gfs2_glockgl_owner_pid-be-a-struct-pid.patch
gfs2-make-gfs2_holdergh_owner_pid-be-a-struct-pid.patch
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