github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-22 20:54:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

tracing/fprobe: Remove redundant memset in fentry_perf_func()

Browse Source 
fentry_perf_func() calls memset(&entry[1], 0, dsize) prior to calling
store_trace_args(). store_trace_args() populates the entry buffer and
handles dynamic data fields.

Furthermore, passing dsize (the dynamic data byte length) to memset at
&entry[1] (the start of fixed trace arguments) is inaccurate as it zeroes
from the fixed args area rather than the dynamic data region.

Remove this redundant memset call to align with fexit_perf_func() and other
probe perf functions.

Link: https://lore.kernel.org/all/178454428366.296567.16465331441301815980.stgit@devnote2/

Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
This commit is contained in:
Masami Hiramatsu (Google) 2026-07-20 19:44:43 +09:00
parent 36db65d0e5
commit 3d785646cc
1 changed files with 0 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
kernel/trace/trace_fprobe.c
View File

@ -471,7 +471,6 @@ static int fentry_perf_func(struct trace_fprobe *tf, unsigned long entry_ip,
regs = ftrace_fill_perf_regs(fregs, regs);
entry->ip = entry_ip;
memset(&entry[1], 0, dsize);
store_trace_args(&entry[1], &tf->tp, fregs, NULL, sizeof(*entry), dsize);
perf_trace_buf_submit(entry, size, rctx, call->event.type, 1, regs,
head, NULL);