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authorLinus Torvalds <torvalds@linux-foundation.org>2014-05-28 08:06:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-05-28 08:06:50 -0700
commit9e3d6331789b113e4abc831ed3447fb67a105430 (patch)
tree7887be53932f723aa7175c62a85187c513435e9a /kernel
parentcd79bde29f00a346eec3fe17c1c5073c37ed95e7 (diff)
parent011e4b02f1da156ac7fea28a9da878f3c23af739 (diff)
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull two powerpc fixes from Ben Herrenschmidt: "Here's a pair of powerpc fixes for 3.15 which are also going to stable. One's a fix for building with newer binutils (the problem currently only affects the BookE kernels but the affected macro might come back into use on BookS platforms at any time). Unfortunately, the binutils maintainer did a backward incompatible change to a construct that we use so we have to add Makefile check. The other one is a fix for CPUs getting stuck in kexec when running single threaded. Since we routinely use kexec on power (including in our newer bootloaders), I deemed that important enough" * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc, kexec: Fix "Processor X is stuck" issue during kexec from ST mode powerpc: Fix 64 bit builds with binutils 2.24
Diffstat (limited to 'kernel')
-rw-r--r--kernel/kexec.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c
index c8380ad203bc..28c57069ef68 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1683,6 +1683,14 @@ int kernel_kexec(void)
kexec_in_progress = true;
kernel_restart_prepare(NULL);
migrate_to_reboot_cpu();
+
+ /*
+ * migrate_to_reboot_cpu() disables CPU hotplug assuming that
+ * no further code needs to use CPU hotplug (which is true in
+ * the reboot case). However, the kexec path depends on using
+ * CPU hotplug again; so re-enable it here.
+ */
+ cpu_hotplug_enable();
printk(KERN_EMERG "Starting new kernel\n");
machine_shutdown();
}