* [PATCH] perf/x86/intel/bts: Replace offsetof() with struct_size()
@ 2025-04-13 10:41 Thorsten Blum
0 siblings, 0 replies; only message in thread
From: Thorsten Blum @ 2025-04-13 10:41 UTC (permalink / raw)
To: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Namhyung Kim, Mark Rutland, Alexander Shishkin, Jiri Olsa,
Ian Rogers, Adrian Hunter, Liang, Kan, Thomas Gleixner,
Borislav Petkov, Dave Hansen, x86, H. Peter Anvin
Cc: Thorsten Blum, linux-perf-users, linux-kernel
Use struct_size() to calculate the number of bytes to allocate for a new
bts_buffer. Compared to offsetof(), struct_size() provides additional
compile-time checks (e.g., __must_be_array()).
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
arch/x86/events/intel/bts.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/events/intel/bts.c b/arch/x86/events/intel/bts.c
index da03f53bfa18..16bc89c8023b 100644
--- a/arch/x86/events/intel/bts.c
+++ b/arch/x86/events/intel/bts.c
@@ -101,7 +101,7 @@ bts_buffer_setup_aux(struct perf_event *event, void **pages,
if (overwrite && nr_buf > 1)
return NULL;
- bb = kzalloc_node(offsetof(struct bts_buffer, buf[nr_buf]), GFP_KERNEL, node);
+ bb = kzalloc_node(struct_size(bb, buf, nr_buf), GFP_KERNEL, node);
if (!bb)
return NULL;
--
2.49.0
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2025-04-13 10:41 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-04-13 10:41 [PATCH] perf/x86/intel/bts: Replace offsetof() with struct_size() Thorsten Blum
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).