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x86: vsyscall: Use NULL instead 0 for a pointer argument 

This patch silences the following sparse warning:
arch/x86/kernel/vsyscall_64.c:250:34:
       warning: Using plain integer as NULL pointer

Signed-off-by: Emil Goode <emilgoode@gmail.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: john.stultz@linaro.org
Link: http://lkml.kernel.org/r/1333306084-3776-1-git-send-email-emilgoode@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Emil Goode 2012-04-01 20:48:04 +02:00 committed by Thomas Gleixner
parent dba69d1092
commit 46ed99d1b7
1 changed files with 3 additions and 3 deletions
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6
arch/x86/kernel/vsyscall_64.c
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@ -216,9 +216,9 @@ bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
current_thread_info()->sig_on_uaccess_error = 1; current_thread_info()->sig_on_uaccess_error = 1;
/* /*
* 0 is a valid user pointer (in the access_ok sense) on 32-bit and * NULL is a valid user pointer (in the access_ok sense) on 32-bit and
* 64-bit, so we don't need to special-case it here. For all the * 64-bit, so we don't need to special-case it here. For all the
* vsyscalls, 0 means "don't write anything" not "write it at * vsyscalls, NULL means "don't write anything" not "write it at
* address 0". * address 0".
*/ */
ret = -EFAULT; ret = -EFAULT;
@ -247,7 +247,7 @@ bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
ret = sys_getcpu((unsigned __user *)regs->di, ret = sys_getcpu((unsigned __user *)regs->di,
(unsigned __user *)regs->si, (unsigned __user *)regs->si,
0); NULL);
break; break;
} }