Commit 80871482 authored Apr 29, 2019 by Linus Torvalds

x86: make ZERO_PAGE() at least parse its argument



This doesn't really do anything, but at least we now parse teh
ZERO_PAGE() address argument so that we'll catch the most obvious errors
in usage next time they'll happen.

See commit 6a5c5d26 ("rdma: fix build errors on s390 and MIPS due to
bad ZERO_PAGE use") what happens when we don't have any use of the macro
argument at all.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 6a5c5d26

arch/x86/include/asm/pgtable.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -46,7 +46,7 @@ void ptdump_walk_user_pgd_level_checkwx(void);
		*/
		extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
		__visible;
		#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
		#define ZERO_PAGE(vaddr) ((void)(vaddr),virt_to_page(empty_zero_page))

		extern spinlock_t pgd_lock;
		extern struct list_head pgd_list;