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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 6a5c5d26c4
("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>
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6a5c5d26c4
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1 changed files with 1 additions and 1 deletions
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@ -46,7 +46,7 @@ void ptdump_walk_user_pgd_level_checkwx(void);
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*/
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extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
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__visible;
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#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
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#define ZERO_PAGE(vaddr) ((void)(vaddr),virt_to_page(empty_zero_page))
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extern spinlock_t pgd_lock;
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extern struct list_head pgd_list;
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