diff options
| author | Ingo Molnar <mingo@kernel.org> | 2018-02-17 13:39:28 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-02-17 13:39:28 +0300 |
| commit | 7057bb975dab827997e0ca9dd92cafef0856b0cc (patch) | |
| tree | 7784dc59c03f25b6bc4fa5cc12d5b61cb8b53765 /mm/process_vm_access.c | |
| parent | 33ea4b24277b06dbc55d7f5772a46f029600255e (diff) | |
| parent | 297f9233b53a08fd457815e19f1d6f2c3389857b (diff) | |
| download | linux-7057bb975dab827997e0ca9dd92cafef0856b0cc.tar.xz | |
Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/process_vm_access.c')
| -rw-r--r-- | mm/process_vm_access.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index 8973cd231ece..a447092d4635 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -25,7 +25,7 @@ /** * process_vm_rw_pages - read/write pages from task specified * @pages: array of pointers to pages we want to copy - * @start_offset: offset in page to start copying from/to + * @offset: offset in page to start copying from/to * @len: number of bytes to copy * @iter: where to copy to/from locally * @vm_write: 0 means copy from, 1 means copy to @@ -147,6 +147,7 @@ static int process_vm_rw_single_vec(unsigned long addr, * @riovcnt: size of rvec array * @flags: currently unused * @vm_write: 0 if reading from other process, 1 if writing to other process + * * Returns the number of bytes read/written or error code. May * return less bytes than expected if an error occurs during the copying * process. @@ -197,11 +198,7 @@ static ssize_t process_vm_rw_core(pid_t pid, struct iov_iter *iter, } /* Get process information */ - rcu_read_lock(); - task = find_task_by_vpid(pid); - if (task) - get_task_struct(task); - rcu_read_unlock(); + task = find_get_task_by_vpid(pid); if (!task) { rc = -ESRCH; goto free_proc_pages; @@ -253,6 +250,7 @@ free_proc_pages: * @riovcnt: size of rvec array * @flags: currently unused * @vm_write: 0 if reading from other process, 1 if writing to other process + * * Returns the number of bytes read/written or error code. May * return less bytes than expected if an error occurs during the copying * process. |