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ftrace: Simplify the dyn_ftrace->flags macro

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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>
This commit is contained in:
Wei Yang 2020-08-31 11:11:01 +08:00 committed by Steven Rostedt (VMware)
parent be49313273
commit 02dae28f0b
1 changed files with 2 additions and 5 deletions
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7
include/linux/ftrace.h
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@ -432,7 +432,7 @@ bool is_ftrace_trampoline(unsigned long addr);
* DIRECT - there is a direct function to call
*
* When a new ftrace_ops is registered and wants a function to save
* pt_regs, the rec->flag REGS is set. When the function has been
* pt_regs, the rec->flags REGS is set. When the function has been
* set up to save regs, the REG_EN flag is set. Once a function
* starts saving regs it will do so until all ftrace_ops are removed
* from tracing that function.
@ -450,12 +450,9 @@ enum {
};
#define FTRACE_REF_MAX_SHIFT 23
#define FTRACE_FL_BITS 9
#define FTRACE_FL_MASKED_BITS ((1UL << FTRACE_FL_BITS) - 1)
#define FTRACE_FL_MASK (FTRACE_FL_MASKED_BITS << FTRACE_REF_MAX_SHIFT)
#define FTRACE_REF_MAX ((1UL << FTRACE_REF_MAX_SHIFT) - 1)
#define ftrace_rec_count(rec) ((rec)->flags & ~FTRACE_FL_MASK)
#define ftrace_rec_count(rec) ((rec)->flags & FTRACE_REF_MAX)
struct dyn_ftrace {
unsigned long ip; /* address of mcount call-site */