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pid: remove pidhash

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pidhash is no longer required as all the information can be looked up
from idr tree.  nr_hashed represented the number of pids that had been
hashed.  Since, nr_hashed and PIDNS_HASH_ADDING are no longer relevant,
it has been renamed to pid_allocated and PIDNS_ADDING respectively.

[gs051095@gmail.com: v6]
  Link: http://lkml.kernel.org/r/1507760379-21662-3-git-send-email-gs051095@gmail.com
Link: http://lkml.kernel.org/r/1507583624-22146-3-git-send-email-gs051095@gmail.com
Signed-off-by: Gargi Sharma <gs051095@gmail.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Tested-by: Tony Luck <tony.luck@intel.com>	[ia64]
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gargi Sharma
2017-11-17 15:30:34 -08:00
committed by Linus Torvalds
parent 95846ecf9d
commit e8cfbc245e
8 changed files with 18 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/init_task.h
View File

@@ -105,7 +105,6 @@ extern struct group_info init_groups;
.numbers = { { \
.nr = 0, \
.ns = &init_pid_ns, \
.pid_chain = { .next = NULL, .pprev = NULL }, \
}, } \
}

2
include/linux/pid.h
View File

@@ -51,10 +51,8 @@ enum pid_type
*/
struct upid {
/* Try to keep pid_chain in the same cacheline as nr for find_vpid */
int nr;
struct pid_namespace *ns;
struct hlist_node pid_chain;
};
struct pid

4
include/linux/pid_namespace.h
View File

@@ -25,7 +25,7 @@ struct pid_namespace {
struct kref kref;
struct idr idr;
struct rcu_head rcu;
unsigned int nr_hashed;
unsigned int pid_allocated;
struct task_struct *child_reaper;
struct kmem_cache *pid_cachep;
unsigned int level;
@@ -49,7 +49,7 @@ struct pid_namespace {
extern struct pid_namespace init_pid_ns;
#define PIDNS_HASH_ADDING (1U << 31)
#define PIDNS_ADDING (1U << 31)
#ifdef CONFIG_PID_NS
static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)