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| author | Steven Rostedt (Google) <[email protected]> | 2023-12-15 08:41:14 -0500 |
|---|---|---|
| committer | Steven Rostedt (Google) <[email protected]> | 2023-12-15 08:43:35 -0500 |
| commit | 0aa0e5289cfe984a8a9fdd79ccf46ccf080151f7 (patch) | |
| tree | c557cbdf38ddd1fa36716271ee32181f963ed5f5 /samples/ftrace/sample-trace-array.c | |
| parent | dec890089bf79a4954b61482715ee2d084364856 (diff) | |
ring-buffer: Have rb_time_cmpxchg() set the msb counter too
The rb_time_cmpxchg() on 32-bit architectures requires setting three
32-bit words to represent the 64-bit timestamp, with some salt for
synchronization. Those are: msb, top, and bottom
The issue is, the rb_time_cmpxchg() did not properly salt the msb portion,
and the msb that was written was stale.
Link: https://lore.kernel.org/linux-trace-kernel/[email protected]
Cc: [email protected]
Cc: Masami Hiramatsu <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Fixes: f03f2abce4f39 ("ring-buffer: Have 32 bit time stamps use all 64 bits")
Signed-off-by: Steven Rostedt (Google) <[email protected]>
Diffstat (limited to 'samples/ftrace/sample-trace-array.c')
0 files changed, 0 insertions, 0 deletions