Takes advantage of the order and locates symbols using binary search.
This work was supported by a hardware donation from the CE Linux Forum.
Signed-off-by: Alessio Igor Bogani <abog...@kernel.org>
---
kernel/module.c | 23 ++++++++++++++++-------
1 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/kernel/module.c b/kernel/module.c
index b438b25..74a57c1 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -57,6 +57,7 @@
#include <linux/kmemleak.h>
#include <linux/jump_label.h>
#include <linux/pfn.h>
+#include <linux/bsearch.h>
#define CREATE_TRACE_POINTS
#include <trace/events/module.h>
@@ -351,22 +352,30 @@ struct find_symbol_arg {
const struct kernel_symbol *sym;
};
+static int cmp_name(const void *va, const void *vb)
+{
+ const char *a;
+ const struct kernel_symbol *b;
+ a = va; b = vb;
+ return strcmp(a, b->name);
+}
+
static bool find_symbol_in_symsearch(const struct symsearch *syms,
struct module *owner,
void *data)
{
struct find_symbol_arg *fsa = data;
+ struct kernel_symbol *sym;
unsigned int symnum;
- int result;
- for (symnum = 0; symnum < syms->stop - syms->start; symnum++) {
- result = strcmp(fsa->name, syms->start[symnum].name);
- if (result == 0)
- break;
- }
- if (symnum >= syms->stop - syms->start)
+ sym = bsearch(fsa->name, syms->start, syms->stop - syms->start,
+ sizeof(struct kernel_symbol), cmp_name);
+
+ if (sym == NULL)
return false;
+ symnum = sym - syms->start;
+
if (!fsa->gplok) {
if (syms->licence == GPL_ONLY)
return false;
--
1.7.4.1
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