module: each_symbol_section instead of each_symbol

Instead of having a callback function for each symbol in the kernel,
have a callback for each array of symbols.

This eases the logic when we move to sorted symbols and binary search.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Alessio Igor Bogani <abogani@kernel.org>

diff --git a/include/linux/module.h b/include/linux/module.h
index 65cc6cc..49f4ad0 100644 (file)
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -477,8 +477,9 @@ const struct kernel_symbol *find_symbol(const char *name,
                                        bool warn);
 
 /* Walk the exported symbol table */
-bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
-                           unsigned int symnum, void *data), void *data);
+bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
+                                   struct module *owner,
+                                   void *data), void *data);
 
 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
    symnum out of range. */

diff --git a/kernel/module.c b/kernel/module.c
index 0e6f97f..e8aa462 100644 (file)
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -240,23 +240,24 @@ static bool each_symbol_in_section(const struct symsearch *arr,
                                   struct module *owner,
                                   bool (*fn)(const struct symsearch *syms,
                                              struct module *owner,
-                                             unsigned int symnum, void *data),
+                                             void *data),
                                   void *data)
 {
-       unsigned int i, j;
+       unsigned int j;
 
        for (j = 0; j < arrsize; j++) {
-               for (i = 0; i < arr[j].stop - arr[j].start; i++)
-                       if (fn(&arr[j], owner, i, data))
-                               return true;
+               if (fn(&arr[j], owner, data))
+                       return true;
        }
 
        return false;
 }
 
 /* Returns true as soon as fn returns true, otherwise false. */
-bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
-                           unsigned int symnum, void *data), void *data)
+bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
+                                   struct module *owner,
+                                   void *data),
+                        void *data)
 {
        struct module *mod;
        static const struct symsearch arr[] = {
@@ -309,7 +310,7 @@ bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
        }
        return false;
 }
-EXPORT_SYMBOL_GPL(each_symbol);
+EXPORT_SYMBOL_GPL(each_symbol_section);
 
 struct find_symbol_arg {
        /* Input */
@@ -323,15 +324,12 @@ struct find_symbol_arg {
        const struct kernel_symbol *sym;
 };
 
-static bool find_symbol_in_section(const struct symsearch *syms,
-                                  struct module *owner,
-                                  unsigned int symnum, void *data)
+static bool check_symbol(const struct symsearch *syms,
+                                struct module *owner,
+                                unsigned int symnum, void *data)
 {
        struct find_symbol_arg *fsa = data;
 
-       if (strcmp(syms->start[symnum].name, fsa->name) != 0)
-               return false;
-
        if (!fsa->gplok) {
                if (syms->licence == GPL_ONLY)
                        return false;
@@ -365,6 +363,20 @@ static bool find_symbol_in_section(const struct symsearch *syms,
        return true;
 }
 
+static bool find_symbol_in_section(const struct symsearch *syms,
+                                  struct module *owner,
+                                  void *data)
+{
+       struct find_symbol_arg *fsa = data;
+       unsigned int i;
+
+       for (i = 0; i < syms->stop - syms->start; i++) {
+               if (strcmp(syms->start[i].name, fsa->name) == 0)
+                       return check_symbol(syms, owner, i, data);
+       }
+       return false;
+}
+
 /* Find a symbol and return it, along with, (optional) crc and
  * (optional) module which owns it.  Needs preempt disabled or module_mutex. */
 const struct kernel_symbol *find_symbol(const char *name,
@@ -379,7 +391,7 @@ const struct kernel_symbol *find_symbol(const char *name,
        fsa.gplok = gplok;
        fsa.warn = warn;
 
-       if (each_symbol(find_symbol_in_section, &fsa)) {
+       if (each_symbol_section(find_symbol_in_section, &fsa)) {
                if (owner)
                        *owner = fsa.owner;
                if (crc)