Patch "ARC: uaccess: dont use "l" gcc inline asm constraint modifier" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

ARC: uaccess: dont use "l" gcc inline asm constraint modifier

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
arc-uaccess-dont-use-l-gcc-inline-asm-constraint-modifier.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Vineet Gupta <[email protected]>
Date: Fri, 8 Dec 2017 08:26:58 -0800
Subject: ARC: uaccess: dont use "l" gcc inline asm constraint modifier

From: Vineet Gupta <[email protected]>

commit 79435ac78d160e4c245544d457850a56f805ac0d upstream.

This used to setup the LP_COUNT register automatically, but now has been removed.

There was an earlier fix 3c7c7a2fc8811 which fixed instance in delay.h but somehow missed this one as gcc change had not made its way into production toolchains and was not pedantic as it is now !

---
 arch/arc/include/asm/uaccess.h |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

@@ -668,6 +668,7 @@ __arc_strncpy_from_user(char *dst, const
 		return 0;
 
 	__asm__ __volatile__(
+	"	mov	lp_count, %5		\n"
 	"	lp	3f			\n"
 	"1:	ldb.ab  %3, [%2, 1]		\n"
 	"	breq.d	%3, 0, 3f               \n"

@@ -684,8 +685,8 @@ __arc_strncpy_from_user(char *dst, const
 	"	.word   1b, 4b			\n"
 	"	.previous			\n"
 	: "+r"(res), "+r"(dst), "+r"(src), "=r"(val)
-	: "g"(-EFAULT), "l"(count)
-	: "memory");
+	: "g"(-EFAULT), "r"(count)
+	: "lp_count", "lp_start", "lp_end", "memory");
 
 	return res;
 }

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/arc-uaccess-dont-use-l-gcc-inline-asm-constraint-modifier.patch