diff options
| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-06-03 15:07:26 -0400 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-06-04 10:38:03 -0400 |
| commit | 420e1354bcb6f006f183a1b6fe5dd21f60a457ef (patch) | |
| tree | 3844c1a6a79d464f0eb90ac9543b95977c71c208 /kernel/trace/fgraph.c | |
| parent | dd120af2d5f8f3d2d742a64cefc4a529d382ab06 (diff) | |
function_graph: Use for_each_set_bit() in __ftrace_return_to_handler()
Instead of iterating through the entire fgraph_array[] and seeing if one
of the bitmap bits are set to know to call the array's retfunc() function,
use for_each_set_bit() on the bitmap itself. This will only iterate for
the number of set bits.
Link: https://lore.kernel.org/linux-trace-kernel/20240603190824.447448026@goodmis.org
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Florent Revest <revest@chromium.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: bpf <bpf@vger.kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alan Maguire <alan.maguire@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Guo Ren <guoren@kernel.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/fgraph.c')
| -rw-r--r-- | kernel/trace/fgraph.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c index f207b7ae5f46..0827b67f746d 100644 --- a/kernel/trace/fgraph.c +++ b/kernel/trace/fgraph.c @@ -783,11 +783,10 @@ static unsigned long __ftrace_return_to_handler(struct fgraph_ret_regs *ret_regs #endif bitmap = get_bitmap_bits(current, offset); - for (i = 0; i < FGRAPH_ARRAY_SIZE; i++) { + + for_each_set_bit(i, &bitmap, sizeof(bitmap) * BITS_PER_BYTE) { struct fgraph_ops *gops = fgraph_array[i]; - if (!(bitmap & BIT(i))) - continue; if (gops == &fgraph_stub) continue; |