ia64/linux-2.6.18-xen.hg

view scripts/mkcompile_h @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
1 TARGET=$1
2 ARCH=$2
3 SMP=$3
4 PREEMPT=$4
5 CC=$5
7 # If compile.h exists already and we don't own autoconf.h
8 # (i.e. we're not the same user who did make *config), don't
9 # modify compile.h
10 # So "sudo make install" won't change the "compiled by <user>"
11 # do "compiled by root"
13 if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then
14 echo " SKIPPED $TARGET"
15 exit 0
16 fi
18 # Do not expand names
19 set -f
21 if [ -r .version ]; then
22 VERSION=`cat .version`
23 else
24 VERSION=0
25 echo 0 > .version
26 fi
29 UTS_VERSION="#$VERSION"
30 CONFIG_FLAGS=""
31 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
32 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
33 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS `LC_ALL=C LANG=C date`"
35 # Truncate to maximum length
37 UTS_LEN=64
38 UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/"
40 # Generate a temporary compile.h
42 ( echo /\* This file is auto generated, version $VERSION \*/
43 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
45 echo \#define UTS_MACHINE \"$ARCH\"
47 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
49 echo \#define LINUX_COMPILE_TIME \"`LC_ALL=C LANG=C date +%T`\"
50 echo \#define LINUX_COMPILE_BY \"`whoami`\"
51 echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\"
53 if [ -x /bin/dnsdomainname ]; then
54 echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\"
55 elif [ -x /bin/domainname ]; then
56 echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\"
57 else
58 echo \#define LINUX_COMPILE_DOMAIN
59 fi
61 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\"
62 ) > .tmpcompile
64 # Only replace the real compile.h if the new one is different,
65 # in order to preserve the timestamp and avoid unnecessary
66 # recompilations.
67 # We don't consider the file changed if only the date/time changed.
68 # A kernel config change will increase the generation number, thus
69 # causing compile.h to be updated (including date/time) due to the
70 # changed comment in the
71 # first line.
73 if [ -r $TARGET ] && \
74 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \
75 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \
76 cmp -s .tmpver.1 .tmpver.2; then
77 rm -f .tmpcompile
78 else
79 echo " UPD $TARGET"
80 mv -f .tmpcompile $TARGET
81 fi
82 rm -f .tmpver.1 .tmpver.2