riscv: uaccess: fix type of 0 variable on error in get_user()

commit b9b916a upstream. If the get_user(x, ptr) has x as a pointer, then the setting of (x) = 0 is going to produce the following sparse warning, so fix this by forcing the type of 'x' when access_ok() fails. fs/aio.c:2073:21: warning: Using plain integer as NULL pointer Signed-off-by: Ben Dooks <[email protected]> Reviewed-by: Palmer Dabbelt <[email protected]> Link: https://lore.kernel.org/r/[email protected] Cc: [email protected] Signed-off-by: Palmer Dabbelt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
pop-os · 13r0ck · Nov 14, 2022 · Sep 19, 2022 · Sep 19, 2022 · Nov 21, 2022
commit 36fd385ae2ca04a95e34f52a188e3aaf985e757f
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h
@@ -165,7 +165,7 @@ do {								\
 	might_fault();						\
 	access_ok(__p, sizeof(*__p)) ?		\
 		__get_user((x), __p) :				\
-		((x) = 0, -EFAULT);				\
+		((x) = (__force __typeof__(x))0, -EFAULT);	\
 })
 
 #define __put_user_asm(insn, x, ptr, err)			\