Patch "powerpc/ps3: Fix system hang with GCC 5 builds" has been added to the 4.9-stable tree

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

powerpc/ps3: Fix system hang with GCC 5 builds

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:
powerpc-ps3-fix-system-hang-with-gcc-5-builds.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 <[email protected]> know about it.

From: Geoff Levand <[email protected]>
Date: Tue, 29 Nov 2016 10:47:32 -0800
Subject: powerpc/ps3: Fix system hang with GCC 5 builds

From: Geoff Levand <[email protected]>

commit 6dff5b67054e17c91bd630bcdda17cfca5aa4215 upstream.

GCC 5 generates different code for this bootwrapper null check that causes the PS3 to hang very early in its bootup. This check is of limited value, so just get rid of it.

---
 arch/powerpc/boot/ps3-head.S |    5 -----
 arch/powerpc/boot/ps3.c      |    8 +-------
 2 files changed, 1 insertion(+), 12 deletions(-)

@@ -57,11 +57,6 @@ __system_reset_overlay:
 	bctr
 
 1:
-	/* Save the value at addr zero for a null pointer write check later. */
-
-	li	r4, 0
-	lwz	r3, 0(r4)
-
 	/* Primary delays then goes to _zimage_start in wrapper. */
 
 	or	31, 31, 31 /* db16cyc */

@@ -119,13 +119,12 @@ void ps3_copy_vectors(void)
 	flush_cache((void *)0x100, 512);
 }
 
-void platform_init(unsigned long null_check)
+void platform_init(void)
 {
 	const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
 	void *chosen;
 	unsigned long ft_addr;
 	u64 rm_size;
-	unsigned long val;
 
 	console_ops.write = ps3_console_write;
 	platform_ops.exit = ps3_exit;

@@ -153,11 +152,6 @@ void platform_init(unsigned long null_ch
 
 	printf(" flat tree at 0x%lx\n\r", ft_addr);
 
-	val = *(unsigned long *)0;
-
-	if (val != null_check)
-		printf("null check failed: %lx != %lx\n\r", val, null_check);
-
 	((kernel_entry_t)0)(ft_addr, 0, NULL);
 
 	ps3_exit();

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/powerpc-ps3-fix-system-hang-with-gcc-5-builds.patch