x86: 0 -> NULL, for arch/x86_64
x86: 0 -> NULL, for arch/x86_64

When comparing a pointer, it's clearer to compare it to NULL than to 0.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Yoann Padioleau <43e83973a08bed11758be01474fa46ae123e9ea8@wanadoo.fr>
Signed-off-by: Andi Kleen <0474aee45985f5ae829f53849df476200e876990@suse.de>
Cc: 0474aee45985f5ae829f53849df476200e876990@suse.de
Cc: 1b7949a7060ddc9ee6e31e42f7c8b0e281f45dc9@x86-64.org
Cc: 5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org
Signed-off-by: Ingo Molnar <9dbbbf0688fedc85ad4da37637f1a64b8c718ee2@elte.hu>
Signed-off-by: Thomas Gleixner <00e4cf8f46a57000a44449bf9dd8cbbcc209fd2a@linutronix.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas