udhcpd: use ptr_to_globals for its lone global data (g_leases)
function old new delta
udhcpd_main 1461 1463 +2
add_lease 320 318 -2
g_leases 4 - -4
write_leases 223 214 -9
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/2 up/down: 2/-15) Total: -13 bytes
text data bss dec hex filename
933232 481 6856 940569 e5a19 busybox_old
933223 481 6852 940556 e5a0c busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c
index 238542b..ff74507 100644
--- a/networking/udhcp/dhcpd.c
+++ b/networking/udhcp/dhcpd.c
@@ -45,7 +45,7 @@
#include "dhcpd.h"
/* globals */
-struct dyn_lease *g_leases;
+#define g_leases ((struct dyn_lease*)ptr_to_globals)
/* struct server_config_t server_config is in bb_common_bufsiz1 */
/* Takes the address of the pointer to the static_leases linked list,
@@ -880,7 +880,9 @@
server_config.max_leases = num_ips;
}
- g_leases = xzalloc(server_config.max_leases * sizeof(g_leases[0]));
+ /* this sets g_leases */
+ SET_PTR_TO_GLOBALS(xzalloc(server_config.max_leases * sizeof(g_leases[0])));
+
read_leases(server_config.lease_file);
if (udhcp_read_interface(server_config.interface,