if test "$version" = 3 && test "$patchlevel" -le 13; then
: # Linux 3.x
else
- AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 3.13.x is not supported])
+ AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 3.13.x is not supported (please refer to the FAQ for advice)])
fi
else
if test "$version" -le 1 || test "$patchlevel" -le 5 || test "$sublevel" -le 31; then
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
+ OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
[OVS_DEFINE([HAVE_BOOL_TYPE])])