Patch "genirq: Use cpumask_available() for check of cpumask variable" has been added to the 4.4-stable tree

Patch "genirq: Use cpumask_available() for check of cpumask variable" has been added to the 4.4-stable tree

[gregkh]

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

    genirq: Use cpumask_available() for check of cpumask variable

to the 4.4-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:
     genirq-use-cpumask_available-for-check-of-cpumask-variable.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From d170fe7dd992b313d4851ae5ab77ee7a51ed8c72 Mon Sep 17 00:00:00 2001
From: Matthias Kaehlcke <mka@chromium.org>
Date: Wed, 12 Apr 2017 11:20:30 -0700
Subject: genirq: Use cpumask_available() for check of cpumask variable

From: Matthias Kaehlcke <mka@chromium.org>

commit d170fe7dd992b313d4851ae5ab77ee7a51ed8c72 upstream.

This fixes the following clang warning when CONFIG_CPUMASK_OFFSTACK=n:

kernel/irq/manage.c:839:28: error: address of array
'desc->irq_common_data.affinity' will always evaluate to 'true'
[-Werror,-Wpointer-bool-conversion]

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Cc: Grant Grundler <grundler@chromium.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg Hackmann <ghackmann@google.com>
Cc: Michael Davidson <md@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20170412182030.83657-2-mka@chromium.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/irq/manage.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -836,7 +836,7 @@ irq_thread_check_affinity(struct irq_des
 	 * This code is triggered unconditionally. Check the affinity
 	 * mask pointer. For CPU_MASK_OFFSTACK=n this is optimized out.
 	 */
-	if (desc->irq_common_data.affinity)
+	if (cpumask_available(desc->irq_common_data.affinity))
 		cpumask_copy(mask, desc->irq_common_data.affinity);
 	else
 		valid = false;


Patches currently in stable-queue which might be from mka@chromium.org are

queue-4.4/dm-ioctl-remove-double-parentheses.patch
queue-4.4/genirq-use-cpumask_available-for-check-of-cpumask-variable.patch
queue-4.4/fs-compat-remove-warning-from-compatible_ioctl.patch
queue-4.4/selinux-remove-unnecessary-check-of-array-base-in-selinux_set_mapping.patch
queue-4.4/pci-make-pci_rom_address_mask-a-32-bit-constant.patch
queue-4.4/cpumask-add-helper-cpumask_available.patch