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x86/ftrace: Remove SYSTEM_BOOTING exceptions

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Now that text_poke is available before ftrace, remove the
SYSTEM_BOOTING exceptions.

Specifically, this cures a W+X case during boot.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221025201057.945960823@infradead.org
This commit is contained in:
Peter Zijlstra 2022-10-25 21:39:47 +02:00 committed by Dave Hansen
parent 5b93a83649
commit eb7d389d5b
2 changed files with 1 additions and 12 deletions
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10
arch/x86/kernel/alternative.c
View File

@ -1681,11 +1681,6 @@ void __ref text_poke_queue(void *addr, const void *opcode, size_t len, const voi
{
struct text_poke_loc *tp;
if (unlikely(system_state == SYSTEM_BOOTING)) {
text_poke_early(addr, opcode, len);
return;
}
text_poke_flush(addr);
tp = &tp_vec[tp_vec_nr++];
@ -1707,11 +1702,6 @@ void __ref text_poke_bp(void *addr, const void *opcode, size_t len, const void *
{
struct text_poke_loc tp;
if (unlikely(system_state == SYSTEM_BOOTING)) {
text_poke_early(addr, opcode, len);
return;
}
text_poke_loc_init(&tp, addr, opcode, len, emulate);
text_poke_bp_batch(&tp, 1);
}

3
arch/x86/kernel/ftrace.c
View File

@ -415,8 +415,7 @@ create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
set_vm_flush_reset_perms(trampoline);
if (likely(system_state != SYSTEM_BOOTING))
set_memory_ro((unsigned long)trampoline, npages);
set_memory_ro((unsigned long)trampoline, npages);
set_memory_x((unsigned long)trampoline, npages);
return (unsigned long)trampoline;
fail: