Patch "pstore: Use dynamic spinlock initializer" has been added to the 4.9-stable tree

Patch "pstore: Use dynamic spinlock initializer" has been added to the 4.9-stable tree

[gregkh]

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

    pstore: Use dynamic spinlock initializer

to the 4.9-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:
     pstore-use-dynamic-spinlock-initializer.patch
and it can be found in the queue-4.9 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 e9a330c4289f2ba1ca4bf98c2b430ab165a8931b Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Sun, 5 Mar 2017 22:08:58 -0800
Subject: pstore: Use dynamic spinlock initializer

From: Kees Cook <keescook@chromium.org>

commit e9a330c4289f2ba1ca4bf98c2b430ab165a8931b upstream.

The per-prz spinlock should be using the dynamic initializer so that
lockdep can correctly track it. Without this, under lockdep, we get a
warning at boot that the lock is in non-static memory.

Fixes: 109704492ef6 ("pstore: Make spinlock per zone instead of global")
Fixes: 76d5692a5803 ("pstore: Correctly initialize spinlock and flags")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/pstore/ram_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -532,7 +532,7 @@ struct persistent_ram_zone *persistent_r
 	}
 
 	/* Initialize general buffer state. */
-	prz->buffer_lock = __RAW_SPIN_LOCK_UNLOCKED(buffer_lock);
+	raw_spin_lock_init(&prz->buffer_lock);
 	prz->flags = flags;
 
 	ret = persistent_ram_buffer_map(start, size, prz, memtype);


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

queue-4.9/pstore-make-spinlock-per-zone-instead-of-global.patch
queue-4.9/pstore-correctly-initialize-spinlock-and-flags.patch
queue-4.9/pstore-allow-prz-to-control-need-for-locking.patch
queue-4.9/isdn-i4l-fix-buffer-overflow.patch
queue-4.9/pstore-use-dynamic-spinlock-initializer.patch