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powerpc/code-patching: Use jump_label for testing freed initmem

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Once init is done, initmem is freed forever so no need to
test system_state at every call to patch_instruction().

Use jump_label.

This reduces by 2% the time needed to activate ftrace on an 8xx.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0aee964721cab7316cffde21a2ca223cee14d373.1647962456.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2022-03-22 16:40:20 +01:00 • committed by Michael Ellerman
parent cb3ac45214
commit b033767848
3 changed files with 8 additions and 1 deletions
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2
arch/powerpc/include/asm/code-patching.h
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@ -22,6 +22,8 @@
#define BRANCH_SET_LINK 0x1
#define BRANCH_ABSOLUTE 0x2
DECLARE_STATIC_KEY_FALSE(init_mem_is_free);
bool is_offset_in_branch_range(long offset);
bool is_offset_in_cond_branch_range(long offset);
int create_branch(ppc_inst_t *instr, const u32 *addr,