tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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modules: Add missing entry for __ex_table

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>

authored by

Helge Deller and committed by
Luis Chamberlain 03ddd2f1 335de24e

+1
+1
scripts/module.lds.S
··· 29 29 .altinstructions 0 : ALIGN(8) { KEEP(*(.altinstructions)) } 30 30 __bug_table 0 : ALIGN(8) { KEEP(*(__bug_table)) } 31 31 __jump_table 0 : ALIGN(8) { KEEP(*(__jump_table)) } 32 + __ex_table 0 : ALIGN(4) { KEEP(*(__ex_table)) } 32 33 33 34 __patchable_function_entries : { *(__patchable_function_entries) } 34 35