This is a note to let you know that I've just added the patch titled xtensa: fix threadptr reload on return to userspace to the 3.14-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: xtensa-fix-threadptr-reload-on-return-to-userspace.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 4229fb12a03e5da5882b420b0aa4a02e77447b86 Mon Sep 17 00:00:00 2001 From: Max Filippov <jcmvbkbc@xxxxxxxxx> Date: Sat, 4 Jul 2015 15:27:39 +0300 Subject: xtensa: fix threadptr reload on return to userspace From: Max Filippov <jcmvbkbc@xxxxxxxxx> commit 4229fb12a03e5da5882b420b0aa4a02e77447b86 upstream. Userspace return code may skip restoring THREADPTR register if there are no registers that need to be zeroed. This leads to spurious failures in libc NPTL tests. Always restore THREADPTR on return to userspace. Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/xtensa/kernel/entry.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -568,12 +568,13 @@ user_exception_exit: * (if we have restored WSBITS-1 frames). */ +2: #if XCHAL_HAVE_THREADPTR l32i a3, a1, PT_THREADPTR wur a3, threadptr #endif -2: j common_exception_exit + j common_exception_exit /* This is the kernel exception exit. * We avoided to do a MOVSP when we entered the exception, but we Patches currently in stable-queue which might be from jcmvbkbc@xxxxxxxxx are queue-3.14/xtensa-fix-kernel-register-spilling.patch queue-3.14/xtensa-fix-threadptr-reload-on-return-to-userspace.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html