blktrace: fix wrong calculation of RWBS
Impact: fix the output of IO type category characters Trace categories are the upper 16 bits, not the lower 16 bits. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <49C89432.8010805@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -922,23 +922,24 @@ static void blk_unregister_tracepoints(void)
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static void fill_rwbs(char *rwbs, const struct blk_io_trace *t)
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{
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int i = 0;
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int tc = t->action >> BLK_TC_SHIFT;
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if (t->action & BLK_TC_DISCARD)
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if (tc & BLK_TC_DISCARD)
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rwbs[i++] = 'D';
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else if (t->action & BLK_TC_WRITE)
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else if (tc & BLK_TC_WRITE)
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rwbs[i++] = 'W';
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else if (t->bytes)
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rwbs[i++] = 'R';
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else
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rwbs[i++] = 'N';
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if (t->action & BLK_TC_AHEAD)
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if (tc & BLK_TC_AHEAD)
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rwbs[i++] = 'A';
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if (t->action & BLK_TC_BARRIER)
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if (tc & BLK_TC_BARRIER)
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rwbs[i++] = 'B';
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if (t->action & BLK_TC_SYNC)
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if (tc & BLK_TC_SYNC)
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rwbs[i++] = 'S';
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if (t->action & BLK_TC_META)
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if (tc & BLK_TC_META)
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rwbs[i++] = 'M';
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rwbs[i] = '\0';
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