MIPS just got changed to only accept a pointer argument for access_ok(), causing one warning in drivers/scsi/pmcraid.c. I tried changing x86 the same way and found the same warning in __get_user_pages_fast() and nowhere else in the kernel during randconfig testing:
mm/gup.c: In function '__get_user_pages_fast': mm/gup.c:1578:6: error: passing argument 1 of '__chk_range_not_ok' makes pointer from integer without a cast [-Werror=int-conversion] It would probably be a good idea to enforce type-safety in general, so let's change this file to not cause a warning if we do that. I don't know why the warning did not appear on MIPS. Fixes: 2667f50e8b81 ("mm: introduce a general RCU get_user_pages_fast()") Cc: Alexander Viro <v...@zeniv.linux.org.uk> Signed-off-by: Arnd Bergmann <a...@arndb.de> --- mm/gup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/gup.c b/mm/gup.c index 2559a3987de7..7f5bc26d9229 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1575,7 +1575,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, end = start + len; if (unlikely(!access_ok(write ? VERIFY_WRITE : VERIFY_READ, - start, len))) + (void __user *)start, len))) return 0; /* -- 2.9.0