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| author | Elijah Wright <git@elijahs.space> | 2025-08-21 08:39:07 +0300 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2025-09-23 16:37:31 +0300 |
| commit | ade2105e748f85eb026d26701091213855aea633 (patch) | |
| tree | bdeb22bca01f4c905141ee2fef20152d755f1b21 /include/linux | |
| parent | 1d67d67a8c88db99ebf5b1323c238929c5fa8483 (diff) | |
| download | linux-ade2105e748f85eb026d26701091213855aea633.tar.xz | |
tracing: Move buffer in trace_seq to end of struct
TRACE_SEQ_BUFFER_SIZE is dependent on the architecture for its size. on 64-bit
systems, it is 8148 bytes. forced 8-byte alignment in size_t and seq_buf means
that trace_seq is 8200 bytes on 64-bit systems. moving the buffer to the end
of the struct fixes the issue. there shouldn't be any side effects, i.e.
pointer arithmetic on trace_seq
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20250821053917.23301-1-git@elijahs.space
Signed-off-by: Elijah Wright <git@elijahs.space>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/trace_seq.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h index a93ed5ac3226..557780fe1c77 100644 --- a/include/linux/trace_seq.h +++ b/include/linux/trace_seq.h @@ -21,10 +21,10 @@ (sizeof(struct seq_buf) + sizeof(size_t) + sizeof(int))) struct trace_seq { - char buffer[TRACE_SEQ_BUFFER_SIZE]; struct seq_buf seq; size_t readpos; int full; + char buffer[TRACE_SEQ_BUFFER_SIZE]; }; static inline void |