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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-03-29 22:45:18 -0400
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-03-31 18:00:45 -0400
commit5bd84629a7a0e2462c28ca52e213ebe27fadfee8 (patch)
tree9fef370dae724a4822358278d0591ba5da1c3a4f /init
parent43ff926a0c3a0cfd6aa313c3232420f009ab43e8 (diff)
downloadlinux-5bd84629a7a0e2462c28ca52e213ebe27fadfee8.tar.bz2
ftrace: Create separate t_func_next() to simplify the function / hash logic
I noticed that if I use dd to read the set_ftrace_filter file that the first hash command is repeated. # cd /sys/kernel/debug/tracing # echo schedule > set_ftrace_filter # echo do_IRQ >> set_ftrace_filter # echo schedule:traceoff >> set_ftrace_filter # echo do_IRQ:traceoff >> set_ftrace_filter # cat set_ftrace_filter schedule do_IRQ schedule:traceoff:unlimited do_IRQ:traceoff:unlimited # dd if=set_ftrace_filter bs=1 schedule do_IRQ schedule:traceoff:unlimited schedule:traceoff:unlimited do_IRQ:traceoff:unlimited 98+0 records in 98+0 records out 98 bytes copied, 0.00265011 s, 37.0 kB/s This is due to the way t_start() calls t_next() as well as the seq_file calls t_next() and the state is slightly different between the two. Namely, t_start() will call t_next() with a local "pos" variable. By separating out the function listing from t_next() into its own function, we can have better control of outputting the functions and the hash of triggers. This simplifies the code. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'init')
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