sizeof() returns a size_t but the other types involved are unsigned long, so using min() results in a warning. As sizeof() is called on an 11 character buffer defined immediately above unsigned long is obviously wide enough for the result. Signed-off-by: Simon Horman --- Compile tested only. $ gcc --version gcc (Debian 4.4.2-6) 4.4.2 Copyright (C) 2009 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ make CONFIG_DEBUG_SECTION_MISMATCH=y ... drivers/staging/rtl8192su/ieee80211/ieee80211_module.c: In function ‘store_debug_level’: drivers/staging/rtl8192su/ieee80211/ieee80211_module.c:265: warning: comparison of distinct pointer types lacks a cast ... Index: gregkh-2.6/drivers/staging/rtl8192su/ieee80211/ieee80211_module.c =================================================================== --- gregkh-2.6.orig/drivers/staging/rtl8192su/ieee80211/ieee80211_module.c 2009-12-23 19:24:36.000000000 +1100 +++ gregkh-2.6/drivers/staging/rtl8192su/ieee80211/ieee80211_module.c 2009-12-23 19:24:38.000000000 +1100 @@ -262,7 +262,7 @@ static int store_debug_level(struct file unsigned long count, void *data) { char buf[] = "0x00000000"; - unsigned long len = min(sizeof(buf) - 1, count); + unsigned long len = min_t(unsigned long, sizeof(buf) - 1, count); char *p = (char *)buf; unsigned long val; Index: gregkh-2.6/drivers/staging/rtl8192u/ieee80211/ieee80211_module.c =================================================================== --- gregkh-2.6.orig/drivers/staging/rtl8192u/ieee80211/ieee80211_module.c 2009-12-23 19:24:47.000000000 +1100 +++ gregkh-2.6/drivers/staging/rtl8192u/ieee80211/ieee80211_module.c 2009-12-23 19:24:50.000000000 +1100 @@ -260,7 +260,7 @@ static int store_debug_level(struct file unsigned long count, void *data) { char buf[] = "0x00000000"; - unsigned long len = min(sizeof(buf) - 1, count); + unsigned long len = min_t(unsigned long, sizeof(buf) - 1, count); char *p = (char *)buf; unsigned long val; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/