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Message-ID: <20250930170301.699930470@kernel.org>
Date: Tue, 30 Sep 2025 13:01:38 -0400
From: Steven Rostedt <rostedt@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Qianfeng Rong <rongqianfeng@...o.com>
Subject: [for-next][PATCH 03/11] tracing: Use vmalloc_array() to improve code
From: Qianfeng Rong <rongqianfeng@...o.com>
Remove array_size() calls and replace vmalloc() with vmalloc_array() in
tracing_map_sort_entries(). vmalloc_array() is optimized better, uses
fewer instructions, and handles overflow more concisely[1].
[1]: https://lore.kernel.org/lkml/abc66ec5-85a4-47e1-9759-2f60ab111971@vivo.com/
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Link: https://lore.kernel.org/20250817084725.59477-1-rongqianfeng@vivo.com
Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
kernel/trace/tracing_map.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c
index 1921ade45be3..7f8da4dab69d 100644
--- a/kernel/trace/tracing_map.c
+++ b/kernel/trace/tracing_map.c
@@ -1076,7 +1076,7 @@ int tracing_map_sort_entries(struct tracing_map *map,
struct tracing_map_sort_entry *sort_entry, **entries;
int i, n_entries, ret;
- entries = vmalloc(array_size(sizeof(sort_entry), map->max_elts));
+ entries = vmalloc_array(map->max_elts, sizeof(sort_entry));
if (!entries)
return -ENOMEM;
--
2.50.1
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