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modules: Add missing entry for __ex_table

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The entry for __ex_table was missing, which may make __ex_table
become 1- or 2-byte aligned in modules.
Add the entry to ensure it gets 32-bit aligned.

As per unaligned-memory-access [0] "unaligned memory accesses [...]
will not work correctly on certain platforms and will cause performance
problems on others", so fix this.

Signed-off-by: Helge Deller <deller@gmx.de>
[mcgrof: added unaligned-memory-access justification]
Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/core-api/unaligned-memory-access.rst # [0]
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
This commit is contained in:
Helge Deller 2023-11-22 23:18:14 +01:00 committed by Luis Chamberlain
parent 335de24e5e
commit 03ddd2f17e
1 changed files with 1 additions and 0 deletions
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scripts/module.lds.S
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@ -29,6 +29,7 @@ SECTIONS {
.altinstructions 0 : ALIGN(8) { KEEP(*(.altinstructions)) }
__bug_table 0 : ALIGN(8) { KEEP(*(__bug_table)) }
__jump_table 0 : ALIGN(8) { KEEP(*(__jump_table)) }
__ex_table 0 : ALIGN(4) { KEEP(*(__ex_table)) }
__patchable_function_entries : { *(__patchable_function_entries) }