[PATCH 31/41] x86/alternatives: Simplify text_poke_int3_handler()

From: Ingo Molnar
Date: Thu Mar 27 2025 - 17:04:18 EST


Remove the 'desc' local variable indirection and use
tp_array directly.

Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/alternative.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 244119066672..9402826e2903 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -2511,7 +2511,6 @@ static __always_inline int patch_cmp(const void *key, const void *elt)

noinstr int text_poke_int3_handler(struct pt_regs *regs)
{
- struct text_poke_int3_array *desc;
struct text_poke_int3_loc *tp;
int ret = 0;
void *ip;
@@ -2531,9 +2530,6 @@ noinstr int text_poke_int3_handler(struct pt_regs *regs)

if (!try_get_tp_array())
return 0;
- desc = &tp_array;
-
- WARN_ON_ONCE(desc->vec != tp_array.vec);

/*
* Discount the INT3. See text_poke_int3_batch().
@@ -2543,14 +2539,14 @@ noinstr int text_poke_int3_handler(struct pt_regs *regs)
/*
* Skip the binary search if there is a single member in the vector.
*/
- if (unlikely(desc->nr_entries > 1)) {
- tp = __inline_bsearch(ip, desc->vec, desc->nr_entries,
+ if (unlikely(tp_array.nr_entries > 1)) {
+ tp = __inline_bsearch(ip, tp_array.vec, tp_array.nr_entries,
sizeof(struct text_poke_int3_loc),
patch_cmp);
if (!tp)
goto out_put;
} else {
- tp = desc->vec;
+ tp = tp_array.vec;
if (text_poke_int3_addr(tp) != ip)
goto out_put;
}
--
2.45.2