kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

livepatch: Remove klp_arch_set_pc() and asm/livepatch.h

Browse source 
All three versions of klp_arch_set_pc() do exactly the same: they
call ftrace_instruction_pointer_set().

Call ftrace_instruction_pointer_set() directly and remove
klp_arch_set_pc().

As klp_arch_set_pc() was the only thing remaining in asm/livepatch.h
on x86 and s390, remove asm/livepatch.h

livepatch.h remains on powerpc but its content is exclusively used
by powerpc specific code.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Petr Mladek <pmladek@suse.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Christophe Leroy 2022-03-28 08:26:48 +02:00 • committed by Petr Mladek
parent d111c9f034
commit 5d7c854593
8 changed files with 3 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

2
kernel/livepatch/patch.c
View file

@ -118,7 +118,7 @@ static void notrace klp_ftrace_handler(unsigned long ip,
if (func->nop)
goto unlock;
klp_arch_set_pc(fregs, (unsigned long)func->new_func);
ftrace_instruction_pointer_set(fregs, (unsigned long)func->new_func);
unlock:
ftrace_test_recursion_unlock(bit);