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-rw-r--r--scripts/kconfig/expr.h5
-rw-r--r--scripts/kconfig/symbol.c29
-rw-r--r--scripts/kconfig/zconf.tab.c_shipped2
-rw-r--r--scripts/kconfig/zconf.y2
4 files changed, 21 insertions, 17 deletions
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 6408fefae083..891cd9ce9ba2 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -86,7 +86,7 @@ struct symbol {
struct expr_value rev_dep;
};
-#define for_all_symbols(i, sym) for (i = 0; i < 257; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
+#define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
#define SYMBOL_CONST 0x0001 /* symbol is const */
#define SYMBOL_CHECK 0x0008 /* used during dependency checking */
@@ -108,8 +108,7 @@ struct symbol {
#define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
#define SYMBOL_MAXLENGTH 256
-#define SYMBOL_HASHSIZE 257
-#define SYMBOL_HASHMASK 0xff
+#define SYMBOL_HASHSIZE 9973
/* A property represent the config options that can be associated
* with a config "symbol".
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 6c8fbbb66ebc..9ee3923117ee 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -651,12 +651,20 @@ bool sym_is_changable(struct symbol *sym)
return sym->visible > sym->rev_dep.tri;
}
+static unsigned strhash(const char *s)
+{
+ /* fnv32 hash */
+ unsigned hash = 2166136261U;
+ for (; *s; s++)
+ hash = (hash ^ *s) * 0x01000193;
+ return hash;
+}
+
struct symbol *sym_lookup(const char *name, int flags)
{
struct symbol *symbol;
- const char *ptr;
char *new_name;
- int hash = 0;
+ int hash;
if (name) {
if (name[0] && !name[1]) {
@@ -666,12 +674,11 @@ struct symbol *sym_lookup(const char *name, int flags)
case 'n': return &symbol_no;
}
}
- for (ptr = name; *ptr; ptr++)
- hash += *ptr;
- hash &= 0xff;
+ hash = strhash(name) % SYMBOL_HASHSIZE;
for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
- if (!strcmp(symbol->name, name) &&
+ if (symbol->name &&
+ !strcmp(symbol->name, name) &&
(flags ? symbol->flags & flags
: !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
return symbol;
@@ -679,7 +686,7 @@ struct symbol *sym_lookup(const char *name, int flags)
new_name = strdup(name);
} else {
new_name = NULL;
- hash = 256;
+ hash = 0;
}
symbol = malloc(sizeof(*symbol));
@@ -697,7 +704,6 @@ struct symbol *sym_lookup(const char *name, int flags)
struct symbol *sym_find(const char *name)
{
struct symbol *symbol = NULL;
- const char *ptr;
int hash = 0;
if (!name)
@@ -710,12 +716,11 @@ struct symbol *sym_find(const char *name)
case 'n': return &symbol_no;
}
}
- for (ptr = name; *ptr; ptr++)
- hash += *ptr;
- hash &= 0xff;
+ hash = strhash(name) % SYMBOL_HASHSIZE;
for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
- if (!strcmp(symbol->name, name) &&
+ if (symbol->name &&
+ !strcmp(symbol->name, name) &&
!(symbol->flags & SYMBOL_CONST))
break;
}
diff --git a/scripts/kconfig/zconf.tab.c_shipped b/scripts/kconfig/zconf.tab.c_shipped
index 8a0867a32b0f..7df3264c3f3d 100644
--- a/scripts/kconfig/zconf.tab.c_shipped
+++ b/scripts/kconfig/zconf.tab.c_shipped
@@ -104,7 +104,7 @@ static void zconf_error(const char *err, ...);
static void zconferror(const char *err);
static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken);
-struct symbol *symbol_hash[257];
+struct symbol *symbol_hash[SYMBOL_HASHSIZE];
static struct menu *current_menu, *current_entry;
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 361b54318c8d..258f16608ec0 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -27,7 +27,7 @@ static void zconf_error(const char *err, ...);
static void zconferror(const char *err);
static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken);
-struct symbol *symbol_hash[257];
+struct symbol *symbol_hash[SYMBOL_HASHSIZE];
static struct menu *current_menu, *current_entry;
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