diff options
| author | NeilBrown <neilb@suse.com> | 2018-12-03 11:30:30 +1100 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2018-12-19 13:52:44 -0500 |
| commit | 97d0fb239c041f5f99655af74812c3ab75cc4346 (patch) | |
| tree | 767e0ff0ed918579b3afb8d9fcd1e37d4143d12b /kernel | |
| parent | d89b22d46a40da3a1630ecea111beaf3ef10bc21 (diff) | |
| download | linux-97d0fb239c041f5f99655af74812c3ab75cc4346.tar.gz linux-97d0fb239c041f5f99655af74812c3ab75cc4346.tar.bz2 linux-97d0fb239c041f5f99655af74812c3ab75cc4346.zip | |
cred: add get_cred_rcu()
Sometimes we want to opportunistically get a
ref to a cred in an rcu_read_lock protected section.
get_task_cred() does this, and NFS does as similar thing
with its own credential structures.
To prepare for NFS converting to use 'struct cred' more
uniformly, define get_cred_rcu(), and use it in
get_task_cred().
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cred.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/cred.c b/kernel/cred.c index 0b3ac72bd717..ba60162249e8 100644 --- a/kernel/cred.c +++ b/kernel/cred.c @@ -195,7 +195,7 @@ const struct cred *get_task_cred(struct task_struct *task) do { cred = __task_cred((task)); BUG_ON(!cred); - } while (!atomic_inc_not_zero(&((struct cred *)cred)->usage)); + } while (!get_cred_rcu(cred)); rcu_read_unlock(); return cred; |