iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86: make ZERO_PAGE() at least parse its argument

Browse Source 
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>
This commit is contained in:
Linus Torvalds 2019-04-29 09:51:29 -07:00
parent 6a5c5d26c4
commit 80871482fd
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/pgtable.h
View File

@ -46,7 +46,7 @@ void ptdump_walk_user_pgd_level_checkwx(void);
*/ */
extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
__visible; __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 spinlock_t pgd_lock;
extern struct list_head pgd_list; extern struct list_head pgd_list;