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Subject[PATCH 2/3] pids: Introduce for_each_tgid() macro
Just a handy macro. This patch converts procfs user to this new
macro, plus android lowmemorykiller driver will use it as well.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
---
fs/proc/base.c | 4 +---
include/linux/pid.h | 5 +++++
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 84b8625..e815d63 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3367,9 +3367,7 @@ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
ns = filp->f_dentry->d_sb->s_fs_info;
iter.task = NULL;
iter.tgid = filp->f_pos - TGID_OFFSET;
- for (iter = next_tgid(ns, iter);
- iter.task;
- iter.tgid += 1, iter = next_tgid(ns, iter)) {
+ for_each_tgid(ns, iter) {
if (has_pid_permissions(ns, iter.task, 2))
__filldir = filldir;
else
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 33e350b..da87cae 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -206,4 +206,9 @@ struct tgid_iter {

struct tgid_iter next_tgid(struct pid_namespace *ns, struct tgid_iter iter);

+#define for_each_tgid(ns, iter) \
+ for (iter = next_tgid(ns, iter); \
+ iter.task; \
+ iter.tgid += 1, iter = next_tgid(ns, iter)) \
+
#endif /* _LINUX_PID_H */
--
1.7.7


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