diff options
author | Christoph Hellwig <hch@lst.de> | 2006-01-08 01:02:33 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:13:51 -0800 |
commit | 6b9c7ed84837753a436415097063232422e29a35 (patch) | |
tree | 6ad59a7bebcec359e08b3a211701781db819450d /arch/s390/kernel | |
parent | 6b34350f490b2c8508717541ec1fd2bbaadded94 (diff) |
[PATCH] use ptrace_get_task_struct in various places
The ptrace_get_task_struct() helper that I added as part of the ptrace
consolidation is useful in variety of places that currently opencode it.
Switch them to the common helpers.
Add a ptrace_traceme() helper that needs to be explicitly called, and simplify
the ptrace_get_task_struct() interface. We don't need the request argument
now, and we return the task_struct directly, using ERR_PTR() for error
returns. It's a bit more code in the callers, but we have two sane routines
that do one thing well now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r-- | arch/s390/kernel/ptrace.c | 29 |
1 files changed, 6 insertions, 23 deletions
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index 8ecda6d66de..cc02232aa96 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -712,35 +712,18 @@ sys_ptrace(long request, long pid, long addr, long data) int ret; lock_kernel(); - if (request == PTRACE_TRACEME) { - /* are we already being traced? */ - ret = -EPERM; - if (current->ptrace & PT_PTRACED) - goto out; - ret = security_ptrace(current->parent, current); - if (ret) - goto out; - /* set the ptrace bit in the process flags. */ - current->ptrace |= PT_PTRACED; - goto out; + ret = ptrace_traceme(); + goto out; } - ret = -EPERM; - if (pid == 1) /* you may not mess with init */ - goto out; - - ret = -ESRCH; - read_lock(&tasklist_lock); - child = find_task_by_pid(pid); - if (child) - get_task_struct(child); - read_unlock(&tasklist_lock); - if (!child) + child = ptrace_get_task_struct(pid); + if (IS_ERR(child)) { + ret = PTR_ERR(child); goto out; + } ret = do_ptrace(child, request, addr, data); - put_task_struct(child); out: unlock_kernel(); |