arm: don't zero in __copy_from_user_inatomic()/__copy_from_user()

adjust copy_from_user(), obviously Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-09-10 16:44:03 -04:00
parent 7798bf2140
commit 91344493b7
2 changed files with 9 additions and 11 deletions
--- a/arch/arm/lib/copy_from_user.S
+++ b/arch/arm/lib/copy_from_user.S
@@ -98,12 +98,9 @@ ENDPROC(arm_copy_from_user)
 	.pushsection .fixup,"ax"
 	.align 0
 	copy_abort_preamble
-	ldmfd	sp!, {r1, r2}
-	sub	r3, r0, r1
-	rsb	r1, r3, r2
-	str	r1, [sp]
-	bl	__memzero
-	ldr	r0, [sp], #4
+	ldmfd	sp!, {r1, r2, r3}
+	sub	r0, r0, r1
+	rsb	r0, r0, r2
 	copy_abort_end
 	.popsection