All clear_page() implementations use XOR which resets flags.

Judging by allyesconfig disassembly no code is affected.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: NBorislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180113185048.GA23111@avx2Signed-off-by: NIngo Molnar <mingo@kernel.org>