Messages in this thread Patch in this message | | | From | David Daney <> | Subject | [PATCH] module: set __jump_table alignment to 8 | Date | Wed, 1 Mar 2017 14:04:53 -0800 |
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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.
Signed-off-by: David Daney <david.daney@cavium.com> Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com> --- scripts/module-common.lds | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/scripts/module-common.lds b/scripts/module-common.lds index 73a2c7d..53234e8 100644 --- 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)) } } -- 2.9.3
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