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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-07-25 01:47:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 10:53:40 -0700 |
| commit | 182c515fd2a942623aed4e4e0e0b37fe96571b05 (patch) | |
| tree | 2b792a4efbb3577e90986ee92d7e1d5d708d0174 /fs/binfmt_elf_fdpic.c | |
| parent | 83914441f94c6f2cd468ca97365f6c34f418706e (diff) | |
| download | lwn-182c515fd2a942623aed4e4e0e0b37fe96571b05.tar.gz lwn-182c515fd2a942623aed4e4e0e0b37fe96571b05.zip | |
coredump: elf_fdpic_core_dump: use core_state->dumper list
Kill the nasty rcu_read_lock() + do_each_thread() loop, use the list
encoded in mm->core_state instead, s/GFP_ATOMIC/GFP_KERNEL/.
This patch allows futher cleanups in binfmt_elf_fdpic.c.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/binfmt_elf_fdpic.c')
| -rw-r--r-- | fs/binfmt_elf_fdpic.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 71bcc4b4d088..1b59b1edf26d 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -1573,7 +1573,6 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, struct memelfnote *notes = NULL; struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */ - struct task_struct *g, *p; LIST_HEAD(thread_list); struct list_head *t; elf_fpregset_t *fpu = NULL; @@ -1622,23 +1621,19 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, #endif if (signr) { + struct core_thread *ct; struct elf_thread_status *tmp; - rcu_read_lock(); - do_each_thread(g,p) - if (current->mm == p->mm && current != p) { - if (p->flags & PF_KTHREAD) - continue; - - tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC); - if (!tmp) { - rcu_read_unlock(); - goto cleanup; - } - tmp->thread = p; - list_add(&tmp->list, &thread_list); - } - while_each_thread(g,p); - rcu_read_unlock(); + + for (ct = current->mm->core_state->dumper.next; + ct; ct = ct->next) { + tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); + if (!tmp) + goto cleanup; + + tmp->thread = ct->task; + list_add(&tmp->list, &thread_list); + } + list_for_each(t, &thread_list) { struct elf_thread_status *tmp; int sz; |