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<title>kernel/arch/openrisc/include/asm/text-patching.h, branch linux-rolling-stable</title>
<subtitle>Hosts the 0x221E linux distro kernel.</subtitle>
<id>https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-rolling-stable</id>
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<updated>2025-09-11T10:27:59Z</updated>
<entry>
<title>openrisc: Add text patching API support</title>
<updated>2025-09-11T10:27:59Z</updated>
<author>
<name>chenmiao</name>
<email>chenmiao.ku@gmail.com</email>
</author>
<published>2025-09-05T18:12:55Z</published>
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<id>urn:sha1:4735037b5d9b0f809c51976c87d737fa2c48fdea</id>
<content type='text'>
Add text patching api's to use in subsequent jump_label implementation.  We use
a new fixmap FIX_TEXT_POKE0 entry to temporarily override MMU mappings to allow
read only text pages to be written to.

Previously, __set_fix was marked with __init as it was only used during the
EARLYCON stage. Now that TEXT_POKE mappings require post-init usage
(e.g., FIX_TEXT_POKE0), keeping __init would cause runtime bugs whenset_fixmap
accesses invalid memory. Thus, we remove the __init flag to ensure __set_fix
remains valid beyond initialization.

A new function patch_insn_write is exposed to allow single instruction patching.

Link: https://lore.kernel.org/openrisc/aJIC8o1WmVHol9RY@antec/T/#t

Signed-off-by: chenmiao &lt;chenmiao.ku@gmail.com&gt;
Signed-off-by: Stafford Horne &lt;shorne@gmail.com&gt;
</content>
</entry>
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