Fix deadlock with stacked loop devices (FS#45129).

PKGBUILD

@@ -5,7 +5,7 @@ pkgbase=linux               # Build stock -ARCH kernel
 #pkgbase=linux-custom       # Build kernel with a different name
 _srcname=linux-4.0
 pkgver=4.0.7
-pkgrel=1
+pkgrel=2
 arch=('i686' 'x86_64')
 url="http://www.kernel.org/"
 license=('GPL2')
@@ -19,6 +19,8 @@ source=("https://www.kernel.org/pub/linux/kernel/v4.x/${_srcname}.tar.xz"
         'config' 'config.x86_64'
         # standard config files for mkinitcpio ramdisk
         'linux.preset'
+        '0001-block-loop-convert-to-per-device-workqueue.patch'
+        '0002-block-loop-avoiding-too-many-pending-per-work-I-O.patch'
         'change-default-console-loglevel.patch')
 sha256sums=('0f2f7d44979bc8f71c4fc5d3308c03499c26a824dd311fdf6eef4dee0d7d5991'
             'SKIP'
@@ -27,6 +29,8 @@ sha256sums=('0f2f7d44979bc8f71c4fc5d3308c03499c26a824dd311fdf6eef4dee0d7d5991'
             'e8d639582697f22333a96aa1614bcf5d9bcf2e6683a3d5296f9cfc64843606f1'
             '5dadd75693e512b77f87f5620e470405b943373613eaf4df561037e9296453be'
             'f0d90e756f14533ee67afda280500511a62465b4f76adcc5effa95a40045179c'
+            '0682df710e8d23f0d420b3b01fbfe409b3911940b1a379b78d9f4a5ac8590386'
+            'af42b1456caee0b0db8f3cc770c78083b40159260b99db4930e503ac7824eacc'
             '1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99')
 validpgpkeys=(
               'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
@@ -44,6 +48,11 @@ prepare() {
   # add latest fixes from stable queue, if needed
   # http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git
 
+  # Fix deadlock with stacked loop devices (FS#45129)
+  # http://marc.info/?l=linux-kernel&m=143280649731902&w=2
+  patch -Np1 -i ../0001-block-loop-convert-to-per-device-workqueue.patch
+  patch -Np1 -i ../0002-block-loop-avoiding-too-many-pending-per-work-I-O.patch
+
   # set DEFAULT_CONSOLE_LOGLEVEL to 4 (same value as the 'quiet' kernel param)
   # remove this when a Kconfig knob is made available by upstream
   # (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227)