[PATCH] tracing: wprobe: Fix to use IS_ERR_PCPU() for per-cpu pointer
From: Masami Hiramatsu (Google)
Date: Mon Oct 06 2025 - 05:47:17 EST
From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Since wprobe uses IS_ERR() for per-cpu pointer, it failed to build.
/tmp/next/build/kernel/trace/trace_wprobe.c: In function '__register_trace_wprobe':
/tmp/next/build/kernel/trace/trace_wprobe.c:176:20: error: cast to generic address space pointer from disjoint '__seg_gs' address space pointer [-Werror]
176 | if (IS_ERR((void * __force)tw->bp_event)) {
| ^
/tmp/next/build/kernel/trace/trace_wprobe.c:177:35: error: cast to generic address space pointer from disjoint '__seg_gs' address space pointer [-Werror]
177 | int ret = PTR_ERR((void * __force)tw->bp_event);
| ^
Use IS_ERR_PCPU() instead.
Reported-by: Mark Brown <broonie@xxxxxxxxxx>
Closes: https://lore.kernel.org/all/aN6fTmAjD7-SJsw2@xxxxxxxxxxxxx/
Suggested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
---
- Confirmed that `make allmodconfig && make` passed on x86_64 and arm64.
---
kernel/trace/trace_wprobe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/trace_wprobe.c b/kernel/trace/trace_wprobe.c
index 4b00a8e917c1..aa8ef173528b 100644
--- a/kernel/trace/trace_wprobe.c
+++ b/kernel/trace/trace_wprobe.c
@@ -173,7 +173,7 @@ static int __register_trace_wprobe(struct trace_wprobe *tw)
attr.bp_type = tw->type;
tw->bp_event = register_wide_hw_breakpoint(&attr, wprobe_perf_handler, tw);
- if (IS_ERR((void * __force)tw->bp_event)) {
+ if (IS_ERR_PCPU((void * __force)tw->bp_event)) {
int ret = PTR_ERR((void * __force)tw->bp_event);
tw->bp_event = NULL;