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2020-10-08ftrace: ftrace_global_list is renamed to ftrace_ops_listWei Yang1-2/+2
Fix the comment to comply with the code. Link: https://lkml.kernel.org/r/20200831031104.23322-7-richard.weiyang@linux.alibaba.com Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-10-08ftrace: Format variable declarations of ftrace_allocate_recordsSteven Rostedt (VMware)1-1/+2
I hate when unrelated variables are declared on the same line. Split them. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-10-08ftrace: Simplify the calculation of page number for ftrace_page->recordsWei Yang1-3/+4
Based on the following two reasones, we could simplify the calculation: - If the number after roundup count is not power of 2, we would definitely have more than 1 empty page with a higher order. - get_count_order() just return current order, so one lower order could meet the requirement. The calculation could be simplified by lower one order level when pages are not power of 2. Link: https://lkml.kernel.org/r/20200831031104.23322-5-richard.weiyang@linux.alibaba.com Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-10-08ftrace: Simplify the dyn_ftrace->flags macroWei Yang1-5/+2
All the three macro are defined to be used for ftrace_rec_count(). This can be achieved by (flags & FTRACE_REF_MAX) directly. Since no other places would use those macros, remove them for clarity. Also it fixes a typo in the comment. Link: https://lkml.kernel.org/r/20200831031104.23322-4-richard.weiyang@linux.alibaba.com Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-10-08ftrace: Simplify the hash calculationSteven Rostedt (VMware)1-4/+3
No need to add a check to subtract the number of bits if bits is zero after fls(). Just divide the size by two before calling it. This does give the same answer for size of 0 and 1, but that's fine. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-10-08ftrace: Use fls() to get the bits for dup_hash()Wei Yang1-2/+3
The effect here is to get the number of bits, lets use fls() to do this job. Link: https://lkml.kernel.org/r/20200831031104.23322-3-richard.weiyang@linux.alibaba.com Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-10-08tracing: Change synthetic event string format to limit printed lengthSteven Rostedt (VMware)1-1/+3
Change the format for printing synthetic field strings to limit the length of the string printed even if it's not correctly terminated. Link: https://lore.kernel.org/r/20201002210036.0200371b@oasis.local.home Link: https://lkml.kernel.org/r/b6bdb34e70d970e8026daa3503db6b8e5cdad524.1601848695.git.zanussi@kernel.org Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>