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authorLinus Torvalds <torvalds@linux-foundation.org>2019-04-29 09:51:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-04-29 09:51:29 -0700
commit80871482fd5cb1cb396ea232237a7d9c540854f9 (patch)
tree4e831e907a6ecf4b4359de200cf8a3685d3faa73 /arch
parent6a5c5d26c4c6c3cc486fef0bf04ff9551132611b (diff)
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 6a5c5d26c4c6 ("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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/pgtable.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 2779ace16d23..50b3e2d963c9 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -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;