diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-12-02 11:31:39 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-12-02 13:59:56 +0300 |
| commit | 84ecfe6f38ae4ee779ebd97ee173937fff565bf9 (patch) | |
| tree | 57ff1093dd08d8d0c858c96a63afb26872dc537b /arch/powerpc/lib | |
| parent | ad050d2390fccb22aa3e6f65e11757ce7a5a7ca5 (diff) | |
| download | linux-84ecfe6f38ae4ee779ebd97ee173937fff565bf9.tar.xz | |
powerpc/code-patching: Remove #ifdef CONFIG_STRICT_KERNEL_RWX
No need to have one implementation of patch_instruction() for
CONFIG_STRICT_KERNEL_RWX and one for !CONFIG_STRICT_KERNEL_RWX.
In patch_instruction(), call raw_patch_instruction() when
!CONFIG_STRICT_KERNEL_RWX.
In poking_init(), bail out immediately, it will be equivalent
to the weak default implementation.
Everything else is declared static and will be discarded by
GCC when !CONFIG_STRICT_KERNEL_RWX.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f67d2a109404d03e8fdf1ea15388c8778337a76b.1669969781.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/code-patching.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c index 5b8f87db1217..a6a5047f8ba2 100644 --- a/arch/powerpc/lib/code-patching.c +++ b/arch/powerpc/lib/code-patching.c @@ -46,8 +46,6 @@ int raw_patch_instruction(u32 *addr, ppc_inst_t instr) return __patch_instruction(addr, instr, addr); } -#ifdef CONFIG_STRICT_KERNEL_RWX - struct patch_context { union { struct vm_struct *area; @@ -208,6 +206,9 @@ void __init poking_init(void) { int ret; + if (!IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)) + return; + if (mm_patch_enabled()) ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/text_poke_mm:online", @@ -358,7 +359,8 @@ static int do_patch_instruction(u32 *addr, ppc_inst_t instr) * when text_poke_area is not ready, but we still need * to allow patching. We just do the plain old patching */ - if (!static_branch_likely(&poking_init_done)) + if (!IS_ENABLED(CONFIG_STRICT_KERNEL_RWX) || + !static_branch_likely(&poking_init_done)) return raw_patch_instruction(addr, instr); local_irq_save(flags); @@ -370,14 +372,6 @@ static int do_patch_instruction(u32 *addr, ppc_inst_t instr) return err; } -#else /* !CONFIG_STRICT_KERNEL_RWX */ - -static int do_patch_instruction(u32 *addr, ppc_inst_t instr) -{ - return raw_patch_instruction(addr, instr); -} - -#endif /* CONFIG_STRICT_KERNEL_RWX */ __ro_after_init DEFINE_STATIC_KEY_FALSE(init_mem_is_free); |