linux-kernel - [PATCH 1/3] coredump: factor out the setting of PF

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Date:	Sun, 24 Feb 2013 18:32:04 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mandeep Singh Baines <msb@...omium.org>,
	Neil Horman <nhorman@...hat.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Tejun Heo <tj@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] coredump: factor out the setting of PF_DUMPCORE

Cleanup and preparation. Every linux_binfmt->core_dump() sets
PF_DUMPCORE, move this into zap_threads() called by do_coredump().

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
 arch/x86/ia32/ia32_aout.c |    1 -
 fs/binfmt_aout.c          |    1 -
 fs/binfmt_elf.c           |    3 +--
 fs/binfmt_elf_fdpic.c     |    2 --
 fs/coredump.c             |    1 +
 5 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index a703af1..24b787c 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -162,7 +162,6 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
 	fs = get_fs();
 	set_fs(KERNEL_DS);
 	has_dumped = 1;
-	current->flags |= PF_DUMPCORE;
 	strncpy(dump.u_comm, current->comm, sizeof(current->comm));
 	dump.u_ar0 = offsetof(struct user32, regs);
 	dump.signal = signr;
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 6043567..f70aea2 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -62,7 +62,6 @@ static int aout_core_dump(struct coredump_params *cprm)
 	fs = get_fs();
 	set_fs(KERNEL_DS);
 	has_dumped = 1;
-	current->flags |= PF_DUMPCORE;
        	strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm));
 	dump.u_ar0 = offsetof(struct user, regs);
 	dump.signal = cprm->siginfo->si_signo;
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 0c42cdb..1f52be1 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -2082,8 +2082,7 @@ static int elf_core_dump(struct coredump_params *cprm)
 		goto cleanup;
 
 	has_dumped = 1;
-	current->flags |= PF_DUMPCORE;
-  
+
 	fs = get_fs();
 	set_fs(KERNEL_DS);
 
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index dc84732..8f2c03d 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1684,8 +1684,6 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm)
 	fill_elf_fdpic_header(elf, e_phnum);
 
 	has_dumped = 1;
-	current->flags |= PF_DUMPCORE;
-
 	/*
 	 * Set up the notes in similar form to SVR4 core dumps made
 	 * with info from their /proc.
diff --git a/fs/coredump.c b/fs/coredump.c
index 5503d94..4f3c8d1 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -290,6 +290,7 @@ static int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
 	if (!signal_group_exit(tsk->signal)) {
 		mm->core_state = core_state;
 		nr = zap_process(tsk, exit_code);
+		tsk->flags = PF_DUMPCORE;
 		tsk->signal->group_exit_task = tsk;
 		/* ignore all signals except SIGKILL, see prepare_signal() */
 		tsk->signal->flags = SIGNAL_GROUP_COREDUMP;
-- 
1.5.5.1

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