Messages in this thread Patch in this message | | | From | "Smith, GeoffX" <> | Date | Tue, 22 Dec 2009 16:33:19 -0800 | Subject | [PATCH] prctl: return MCE process flags through pointer |
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This patch fixes the semantics of prctl() option PR_MCE_KILL_GET to pass the return value through *arg2.
With this change, the option now follows the same conventions as the other "get" options added since 2.6.0, and also brings it into conformance with the advice in chapter 16 of Documentation/CodingStyle.
This prctl() option was only added within the last month, so there are not any production applications to break. This patch applies cleanly to mainline and to 2.6.32.2 for backporting.
Signed-off-by: Geoff Smith <geoffx.smith@intel.com>
diff --git a/kernel/sys.c b/kernel/sys.c index 26a6b73..347021a 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1570,13 +1570,16 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, error = 0; break; case PR_MCE_KILL_GET: - if (arg2 | arg3 | arg4 | arg5) + if (arg3 | arg4 | arg5) return -EINVAL; if (current->flags & PF_MCE_PROCESS) - error = (current->flags & PF_MCE_EARLY) ? - PR_MCE_KILL_EARLY : PR_MCE_KILL_LATE; + error = put_user( + (current->flags & PF_MCE_EARLY) ? + PR_MCE_KILL_EARLY : PR_MCE_KILL_LATE, + (unsigned long __user *)arg2); else - error = PR_MCE_KILL_DEFAULT; + error = put_user(PR_MCE_KILL_DEFAULT, + (unsigned long __user *)arg2); break; default: error = -EINVAL; return -EINVAL;
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