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| author | Adrian Hunter <adrian.hunter@intel.com> | 2018-06-06 14:54:09 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-08-15 00:10:23 +0200 |
| commit | b96679422007c3fa04625be14977904c27c722eb (patch) | |
| tree | 58f97128afaf2d73fac4f5b0548116faf1a90cd8 /kernel | |
| parent | perf auxtrace: Fix queue resize (diff) | |
| download | linux-b96679422007c3fa04625be14977904c27c722eb.tar.xz linux-b96679422007c3fa04625be14977904c27c722eb.zip | |
kallsyms: Simplify update_iter_mod()
The logic in update_iter_mod() is overcomplicated and gets worse every
time another get_ksymbol_* function is added.
In preparation for adding another get_ksymbol_* function, simplify logic
in update_iter_mod().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: (ftrace changes only) Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1528289651-4113-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kallsyms.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index a23e21ada81b..aa31aa07f2ef 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -506,27 +506,24 @@ static void reset_iter(struct kallsym_iter *iter, loff_t new_pos) } } +/* + * The end position (last + 1) of each additional kallsyms section is recorded + * in iter->pos_..._end as each section is added, and so can be used to + * determine which get_ksymbol_...() function to call next. + */ static int update_iter_mod(struct kallsym_iter *iter, loff_t pos) { iter->pos = pos; - if (iter->pos_ftrace_mod_end > 0 && - iter->pos_ftrace_mod_end < iter->pos) - return get_ksymbol_bpf(iter); - - if (iter->pos_mod_end > 0 && - iter->pos_mod_end < iter->pos) { - if (!get_ksymbol_ftrace_mod(iter)) - return get_ksymbol_bpf(iter); + if ((!iter->pos_mod_end || iter->pos_mod_end > pos) && + get_ksymbol_mod(iter)) return 1; - } - if (!get_ksymbol_mod(iter)) { - if (!get_ksymbol_ftrace_mod(iter)) - return get_ksymbol_bpf(iter); - } + if ((!iter->pos_ftrace_mod_end || iter->pos_ftrace_mod_end > pos) && + get_ksymbol_ftrace_mod(iter)) + return 1; - return 1; + return get_ksymbol_bpf(iter); } /* Returns false if pos at or past end of file. */ |