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Subject[PATCH 1/4] alpha: Return an error code only as a constant in osf_sigstack()
From
Date
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Wed, 18 Jan 2017 10:40:51 +0100

* Return an error code without storing it in an intermediate variable.

* Delete the local variable "error" which became unnecessary with
this refactoring.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
arch/alpha/kernel/osf_sys.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 56e427c7aa3c..41174156a676 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -691,20 +691,17 @@ SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
unsigned long usp = rdusp();
unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
unsigned long oss_os = on_sig_stack(usp);
- int error;

if (uss) {
void __user *ss_sp;

- error = -EFAULT;
if (get_user(ss_sp, &uss->ss_sp))
- goto out;
+ return -EFAULT;

/* If the current stack was set with sigaltstack, don't
swap stacks while we are on it. */
- error = -EPERM;
if (current->sas_ss_sp && on_sig_stack(usp))
- goto out;
+ return -EPERM;

/* Since we don't know the extent of the stack, and we don't
track onstack-ness, but rather calculate it, we must
@@ -714,16 +711,12 @@ SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
}

if (uoss) {
- error = -EFAULT;
if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
|| __put_user(oss_sp, &uoss->ss_sp)
|| __put_user(oss_os, &uoss->ss_onstack))
- goto out;
+ return -EFAULT;
}
-
- error = 0;
- out:
- return error;
+ return 0;
}

SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
--
2.11.0
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