No need for L argument to lj_str_initbuf().

src/lj_api.c

@@ -1133,7 +1133,7 @@ LUA_API int lua_load(lua_State *L, lua_Reader reader, void *data,
   ls.rfunc = reader;
   ls.rdata = data;
   ls.chunkarg = chunkname ? chunkname : "?";
-  lj_str_initbuf(L, &ls.sb);
+  lj_str_initbuf(&ls.sb);
   status = lj_vm_cpcall(L, NULL, &ls, cpparser);
   lj_lex_cleanup(L, &ls);
   lj_gc_check(L);

src/lj_cparse.c

@@ -364,7 +364,7 @@ static void cp_init(CPState *cp)
   cp->depth = 0;
   cp->curpack = 0;
   cp->packstack[0] = 255;
-  lj_str_initbuf(cp->L, &cp->sb);
+  lj_str_initbuf(&cp->sb);
   lj_str_resizebuf(cp->L, &cp->sb, LJ_MIN_SBUF);
   lua_assert(cp->p != NULL);
   cp_get(cp);  /* Read-ahead first char. */

src/lj_state.c

@@ -203,7 +203,7 @@ LUA_API lua_State *lua_newstate(lua_Alloc f, void *ud)
   setnilV(&g->nilnode.val);
   setnilV(&g->nilnode.key);
   setmref(g->nilnode.freetop, &g->nilnode);
-  lj_str_initbuf(L, &g->tmpbuf);
+  lj_str_initbuf(&g->tmpbuf);
   g->gc.state = GCSpause;
   setgcref(g->gc.root, obj2gco(L));
   setmref(g->gc.sweep, &g->gc.root);

src/lj_str.h

@@ -43,7 +43,7 @@ LJ_FUNC const char *lj_str_pushf(lua_State *L, const char *fmt, ...)
 /* Resizable string buffers. Struct definition in lj_obj.h. */
 LJ_FUNC char *lj_str_needbuf(lua_State *L, SBuf *sb, MSize sz);
 
-#define lj_str_initbuf(L, sb)	((sb)->buf = NULL, (sb)->sz = 0)
+#define lj_str_initbuf(sb)	((sb)->buf = NULL, (sb)->sz = 0)
 #define lj_str_resetbuf(sb)	((sb)->n = 0)
 #define lj_str_resizebuf(L, sb, size) \
   ((sb)->buf = (char *)lj_mem_realloc(L, (sb)->buf, (sb)->sz, (size)), \