diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-07-09 01:01:03 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 19:33:26 +0200 |
| commit | 61e305c716c0737c97bd133313cc90e99a93712e (patch) | |
| tree | e4c37ce9d33c3a63b2c70e851f55eb7e52b4bd88 /arch/x86/kernel/ptrace.c | |
| parent | ptrace/x86: ptrace_write_dr7() should create bp if !disabled (diff) | |
| download | linux-61e305c716c0737c97bd133313cc90e99a93712e.tar.xz linux-61e305c716c0737c97bd133313cc90e99a93712e.zip | |
ptrace/x86: cleanup ptrace_set_debugreg()
ptrace_set_debugreg() is trivial but looks horrible. Kill the unnecessary
goto's and return's to cleanup the code.
This matches ptrace_get_debugreg() which also needs the trivial whitespace
cleanups.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Prasad <prasad@linux.vnet.ibm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/ptrace.c')
| -rw-r--r-- | arch/x86/kernel/ptrace.c | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index 5c387b3dce3f..7461f50d5bb1 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -703,7 +703,7 @@ restore: */ static unsigned long ptrace_get_debugreg(struct task_struct *tsk, int n) { - struct thread_struct *thread = &(tsk->thread); + struct thread_struct *thread = &tsk->thread; unsigned long val = 0; if (n < HBP_NUM) { @@ -713,7 +713,7 @@ static unsigned long ptrace_get_debugreg(struct task_struct *tsk, int n) val = bp->hw.info.address; } else if (n == 6) { val = thread->debugreg6; - } else if (n == 7) { + } else if (n == 7) { val = thread->ptrace_dr7; } return val; @@ -761,30 +761,20 @@ static int ptrace_set_breakpoint_addr(struct task_struct *tsk, int nr, static int ptrace_set_debugreg(struct task_struct *tsk, int n, unsigned long val) { - struct thread_struct *thread = &(tsk->thread); - int rc = 0; - + struct thread_struct *thread = &tsk->thread; /* There are no DR4 or DR5 registers */ - if (n == 4 || n == 5) - return -EIO; + int rc = -EIO; - if (n == 6) { - thread->debugreg6 = val; - goto ret_path; - } if (n < HBP_NUM) { rc = ptrace_set_breakpoint_addr(tsk, n, val); - if (rc) - return rc; - } - /* All that's left is DR7 */ - if (n == 7) { + } else if (n == 6) { + thread->debugreg6 = val; + rc = 0; + } else if (n == 7) { rc = ptrace_write_dr7(tsk, val); if (!rc) thread->ptrace_dr7 = val; } - -ret_path: return rc; } |