This is a note to let you know that I've just added the patch titled module: set __jump_table alignment to 8 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: module-set-__jump_table-alignment-to-8.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@xxxxxxxxxxxxxxx> know about it. >From foo@baz Tue Dec 12 13:38:50 CET 2017 From: David Daney <david.daney@xxxxxxxxxx> Date: Wed, 1 Mar 2017 14:04:53 -0800 Subject: module: set __jump_table alignment to 8 From: David Daney <david.daney@xxxxxxxxxx> [ Upstream commit ab42632156becd35d3884ee5c14da2bedbf3149a ] For powerpc the __jump_table section in modules is not aligned, this causes a WARN_ON() splat when loading a module containing a __jump_table. Strict alignment became necessary with commit 3821fd35b58d ("jump_label: Reduce the size of struct static_key"), currently in linux-next, which uses the two least significant bits of pointers to __jump_table elements. Fix by forcing __jump_table to 8, which is the same alignment used for this section in the kernel proper. Link: http://lkml.kernel.org/r/20170301220453.4756-1-david.daney@xxxxxxxxxx Reviewed-by: Jason Baron <jbaron@xxxxxxxxxx> Acked-by: Jessica Yu <jeyu@xxxxxxxxxx> Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc) Tested-by: Sachin Sant <sachinp@xxxxxxxxxxxxxxxxxx> Signed-off-by: David Daney <david.daney@xxxxxxxxxx> Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- scripts/module-common.lds | 2 ++ 1 file changed, 2 insertions(+) --- a/scripts/module-common.lds +++ b/scripts/module-common.lds @@ -19,4 +19,6 @@ SECTIONS { . = ALIGN(8); .init_array 0 : { *(SORT(.init_array.*)) *(.init_array) } + + __jump_table 0 : ALIGN(8) { KEEP(*(__jump_table)) } } Patches currently in stable-queue which might be from david.daney@xxxxxxxxxx are queue-4.4/module-set-__jump_table-alignment-to-8.patch