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opterror and optbug functions are used by some of parsing routines
in parse-options.c to report errors and bugs respectively.
Export these functions to allow more custom parsing routines to use
them in a uniform way.
Signed-off-by: Dmitry Ivankov <divanorama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* oa/pull-reflog:
pull: remove extra space from reflog message
Conflicts:
git-pull.sh
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When executing "git pull" with no arguments, the reflog message was:
"pull : Fast-forward"
Signed-off-by: Ori Avtalion <ori@avtalion.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* ms/reflog-show-is-default:
reflog: actually default to subcommand 'show'
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The reflog manpage says:
git reflog [show] [log-options] [<ref>]
the subcommand 'show' is the default "in the absence of any
subcommands". Currently this is only true if the user provided either
at least one option or no additional argument at all. For example:
git reflog master
won't work. Change this by actually calling cmd_log_reflog in
absence of any subcommand.
Signed-off-by: Michael Schubert <mschub@elegosoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jl/submodule-status-summary-doc:
Documentation/submodule: add command references and update options
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Reference the "git diff" and "git status" commands where they learned
functionality that in earlier git versions was only available through the
'summary' and 'status' subcommands of "git submodule".
The short option '-n' for '--summary-limit' was missing from the synopsis
and the --init option was missing from the "options" section, add those
there. And while at it, quote all options in backticks so they are
decorated properly in the output formats which support that.
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jn/gitweb-config-list-case:
gitweb: Git config keys are case insensitive, make config search too
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"git config -z -l" that gitweb uses in git_parse_project_config() to
populate %config hash returns section and key names of config
variables in lowercase (they are case insensitive). When checking
%config in git_get_project_config() we have to take it into account.
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jl/submodule-update-quiet:
submodule: update and add must honor --quiet flag
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When using the --quiet flag "git submodule update" and "git submodule add"
didn't behave as the documentation stated. They printed progress output
from the clone, even though they should only print error messages.
Fix that by passing the -q flag to git clone in module_clone() when the
GIT_QUIET variable is set. Two tests in t7400 have been modified to test
that behavior.
Reported-by: Daniel Holtmann-Rice <flyingtabmow@gmail.com>
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* js/ls-tree-error:
Ensure git ls-tree exits with a non-zero exit code if read_tree_recursive fails.
Add a test to check that git ls-tree sets non-zero exit code on error.
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In the case of a corrupt repository, git ls-tree may report an error but
presently it exits with a code of 0.
This change uses the return code of read_tree_recursive instead.
Improved-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Expected to fail at this commit, fixed by subsequent commit.
Additional tests of adhoc or uncategorised nature should be added to this
file.
Improved-by: Jens Lehmann <Jens.Lehmann@web.de>
Improved-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jn/gitweb-system-config:
gitweb: Introduce common system-wide settings for convenience
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Because of backward compatibility we cannot change gitweb to always
use /etc/gitweb.conf (i.e. even if gitweb_config.perl exists). For
common system-wide settings we therefore need separate configuration
file: /etc/gitweb-common.conf.
Long description:
gitweb currently obtains configuration from the following sources:
1. per-instance configuration file (default: gitweb_conf.perl)
2. system-wide configuration file (default: /etc/gitweb.conf)
If per-instance configuration file exists, then system-wide
configuration is _not used at all_. This is quite untypical and
suprising behavior.
Moreover it is different from way git itself treats /etc/git.conf. It
reads in stuff from /etc/git.conf and then local repos can change or
override things as needed. In fact this is quite beneficial, because
it gives site admins a simple and easy way to give an automatic hint
to a repo about things the admin would like.
On the other hand changing current behavior may lead to the situation,
where something in /etc/gitweb.conf may interfere with unintended
interaction in the local repository. One solution would be to
_require_ to do explicit include; with read_config_file() it is now
easy, as described in gitweb/README (description introduced in this
commit).
But as J.H. noticed we cannot ask people to modify their per-instance
gitweb config file to include system-wide settings, nor we can require
them to do this.
Therefore, as proposed by Junio, for gitweb to have centralized config
elements while retaining backwards compatibility, introduce separate
common system-wide configuration file, by default /etc/gitweb-common.conf
Noticed-by: Drew Northup <drew.northup@maine.edu>
Helped-by: John 'Warthog9' Hawley <warthog9@kernel.org>
Inspired-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jk/reset-reflog-message-fix:
reset: give better reflog messages
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The reset command creates its reflog entry from argv.
However, it does so after having run parse_options, which
means the only thing left in argv is any non-option
arguments. Thus you would end up with confusing reflog
entries like:
$ git reset --hard HEAD^
$ git reset --soft HEAD@{1}
$ git log -2 -g --oneline
8e46cad HEAD@{0}: HEAD@{1}: updating HEAD
1eb9486 HEAD@{1}: HEAD^: updating HEAD
However, we must also consider that some scripts may set
GIT_REFLOG_ACTION before calling reset, and we need to show
their reflog action (with our text appended). For example:
rebase -i (squash): updating HEAD
On top of that, we also set the ORIG_HEAD reflog action
(even though it doesn't generally exist). In that case, the
reset argument is somewhat meaningless, as it has nothing to
do with what's in ORIG_HEAD.
This patch changes the reset reflog code to show:
$GIT_REFLOG_ACTION: updating {HEAD,ORIG_HEAD}
as before, but only if GIT_REFLOG_ACTION is set. Otherwise,
show:
reset: moving to $rev
for HEAD, and:
reset: updating ORIG_HEAD
for ORIG_HEAD (this is still somewhat superfluous, since we
are in the ORIG_HEAD reflog, obviously, but at least we now
mention which command was used to update it).
While we're at it, we can clean up the code a bit:
- Use strbufs to make the message.
- Use the "rev" parameter instead of showing all options.
This makes more sense, since it is the only thing
impacting the writing of the ref.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jc/diff-index-refactor:
diff-lib: refactor run_diff_index() and do_diff_cache()
diff-lib: simplify do_diff_cache()
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The latter is meant to be an API for internal callers that want to inspect
the resulting diff-queue, while the former is an implementation of "git
diff-index" command. Extract the common logic into a single helper
function and make them thin wrappers around it.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Since 34110cd (Make 'unpack_trees()' have a separate source and
destination index, 2008-03-06), we can run unpack_trees() without munging
the index at all, but do_diff_cache() tried ever so carefully to work
around the old behaviour of the function.
We can just tell unpack_trees() not to touch the original index and there
is no need to clean-up whatever the previous round has done.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* maint:
filter-branch: Export variable `workdir' for --commit-filter
Documentation/Makefile: add *.pdf to `clean' target
Documentation: ignore *.pdf files
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According to `git help filter-branch':
--commit-filter <command>
...
You can use the _map_ convenience function in this filter,
and other convenience functions, too...
...
However, it turns out that `map' hasn't been usable because it depends
on the variable `workdir', which is not propogated to the environment
of the shell that runs the commit-filter <command> because the
shell is created via a simple-command rather than a compound-command
subshell:
@SHELL_PATH@ -c "$filter_commit" "git commit-tree" \
$(git write-tree) $parentstr < ../message > ../map/$commit ||
die "could not write rewritten commit"
One solution is simply to export `workdir'. However, it seems rather
heavy-handed to export `workdir' to the environments of all commands,
so instead this commit exports `workdir' for only the duration of the
shell command in question:
workdir=$workdir @SHELL_PATH@ -c "$filter_commit" "git commit-tree" \
$(git write-tree) $parentstr < ../message > ../map/$commit ||
die "could not write rewritten commit"
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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user-manual.pdf is not removed by `make clean'; fix it.
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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user-manual.pdf is generated by the build and therefore
should be ignored by git.
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* tc/minix:
Makefile: add Minix configuration options.
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Add a $(uname_S) case for Minix with the correct options.
Minix's linker needs all libraries specified explicitly.
Add NEEDS_SSL_WITH_CURL to add -lssl when using -lcurl.
Add NEEDS_IDN_WITH_CURL to add -lidn when using -lcurl.
When NEEDS_SSL_WITH_CURL is defined and NEEDS_CRYPTO_WITH_SSL
is defined, add -lcrypt to CURL_LIBCURL.
Change OPENSSL_LINK to OPENSSL_LIBSSL in the
NEEDS_CRYPTO_WITH_SSL conditional in the libopenssl
section. Libraries go in OPENSSL_LIBSSL, OPENSSL_LINK
is for linker flags.
Signed-off-by: Thomas Cort <tcort@minix3.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jc/pack-order-tweak:
pack-objects: optimize "recency order"
core: log offset pack data accesses happened
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This optimizes the "recency order" (see pack-heuristics.txt in
Documentation/technical/ directory) used to order objects within a
packfile in three ways:
- Commits at the tip of tags are written together, in the hope that
revision traversal done in incremental fetch (which starts by
putting them in a revision queue marked as UNINTERESTING) will see a
better locality of these objects;
- In the original recency order, trees and blobs are intermixed. Write
trees together before blobs, in the hope that this will improve
locality when running pathspec-limited revision traversal, i.e.
"git log paths...";
- When writing blob objects out, write the whole family of blobs that use
the same delta base object together, by starting from the root of the
delta chain, and writing its immediate children in a width-first
manner, in the hope that this will again improve locality when reading
blobs that belong to the same path, which are likely to be deltified
against each other.
I tried various workloads in the Linux kernel repositories (HEAD at
v3.0-rc6-71-g4dd1b49) packed with v1.7.6 and with this patch, counting how
large seeks are needed between adjacent accesses to objects in the pack,
and the result looks promising. The history has 2072052 objects, weighing
some 490MiB.
* Simple commit-only log.
$ git log >/dev/null
There are 254656 commits in total.
v1.7.6 with patch
Total number of access : 258,031 258,032
0.0% percentile : 12 12
10.0% percentile : 259 259
20.0% percentile : 294 294
30.0% percentile : 326 326
40.0% percentile : 363 363
50.0% percentile : 415 415
60.0% percentile : 513 513
70.0% percentile : 857 858
80.0% percentile : 10,434 10,441
90.0% percentile : 91,985 91,996
95.0% percentile : 260,852 260,885
99.0% percentile : 1,150,680 1,152,811
99.9% percentile : 3,148,435 3,148,435
Less than 2MiB seek: 99.70% 99.69%
95% of the pack accesses look at data that is no further than 260kB
from the previous location we accessed. The patch does not change the
order of commit objects very much, and the result is very similar.
* Pathspec-limited log.
$ git log drivers/net >/dev/null
The path is touched by 26551 commits and merges (among 254656 total).
v1.7.6 with patch
Total number of access : 559,511 558,663
0.0% percentile : 0 0
10.0% percentile : 182 167
20.0% percentile : 259 233
30.0% percentile : 357 304
40.0% percentile : 714 485
50.0% percentile : 5,046 3,976
60.0% percentile : 688,671 443,578
70.0% percentile : 319,574,732 110,370,100
80.0% percentile : 361,647,599 123,707,229
90.0% percentile : 393,195,669 128,947,636
95.0% percentile : 405,496,875 131,609,321
99.0% percentile : 412,942,470 133,078,115
99.5% percentile : 413,172,266 133,163,349
99.9% percentile : 413,354,356 133,240,445
Less than 2MiB seek: 61.71% 62.87%
With the current pack heuristics, more than 30% of accesses have to
seek further than 300MB; the updated pack heuristics ensures that less
than 0.1% of accesses have to seek further than 135MB. This is largely
due to the fact that the updated heuristics does not mix blobs and
trees together.
* Blame.
$ git blame drivers/net/ne.c >/dev/null
The path is touched by 34 commits and merges.
v1.7.6 with patch
Total number of access : 178,147 178,166
0.0% percentile : 0 0
10.0% percentile : 142 139
20.0% percentile : 222 194
30.0% percentile : 373 300
40.0% percentile : 1,168 837
50.0% percentile : 11,248 7,334
60.0% percentile : 305,121,284 106,850,130
70.0% percentile : 361,427,854 123,709,715
80.0% percentile : 388,127,343 128,171,047
90.0% percentile : 399,987,762 130,200,707
95.0% percentile : 408,230,673 132,174,308
99.0% percentile : 412,947,017 133,181,160
99.5% percentile : 413,312,798 133,220,425
99.9% percentile : 413,352,366 133,269,051
Less than 2MiB seek: 56.47% 56.83%
The result is very similar to the pathspec-limited log above, which
only looks at the tree objects.
* Packing recent history.
$ (git for-each-ref --format='^%(refname)' refs/tags; echo HEAD) |
git pack-objects --revs --stdout >/dev/null
This should pack data worth 71 commits.
v1.7.6 with patch
Total number of access : 11,511 11,514
0.0% percentile : 0 0
10.0% percentile : 48 47
20.0% percentile : 134 98
30.0% percentile : 332 178
40.0% percentile : 1,386 293
50.0% percentile : 8,030 478
60.0% percentile : 33,676 1,195
70.0% percentile : 147,268 26,216
80.0% percentile : 9,178,662 464,598
90.0% percentile : 67,922,665 965,782
95.0% percentile : 87,773,251 1,226,102
99.0% percentile : 98,011,763 1,932,377
99.5% percentile : 100,074,427 33,642,128
99.9% percentile : 105,336,398 275,772,650
Less than 2MiB seek: 77.09% 99.04%
The long-tail part of the result looks worse with the patch, but
the change helps majority of the access. 99.04% of the accesses
need less than 2MiB of seeking, compared to 77.09% with the current
packing heuristics.
* Index pack.
$ git index-pack -v .git/objects/pack/pack*.pack
v1.7.6 with patch
Total number of access : 2,791,228 2,788,802
0.0% percentile : 9 9
10.0% percentile : 140 89
20.0% percentile : 233 167
30.0% percentile : 322 235
40.0% percentile : 464 310
50.0% percentile : 862 423
60.0% percentile : 2,566 686
70.0% percentile : 25,827 1,498
80.0% percentile : 1,317,862 4,971
90.0% percentile : 11,926,385 119,398
95.0% percentile : 41,304,149 952,519
99.0% percentile : 227,613,070 6,709,650
99.5% percentile : 321,265,121 11,734,871
99.9% percentile : 382,919,785 33,155,191
Less than 2MiB seek: 81.73% 96.92%
As the index-pack command already walks objects in the delta chain
order, writing the blobs out in the delta chain order seems to
drastically improve the locality of access.
Note that a half-a-gigabyte packfile comfortably fits in the buffer cache,
and you would unlikely to see much performance difference on a modern and
reasonably beefy machine with enough memory and local disks. Benchmarking
with cold cache (or over NFS) would be interesting.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a workload other than "git log" (without pathspec nor any option that
causes us to inspect trees and blobs), the recency pack order is said to
cause the access jump around quite a bit. Add a hook to allow us observe
how bad it is.
"git config core.logpackaccess /var/tmp/pal.txt" will give you the log
in the specified file.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Many examples of git command invocation are given in asciidoc listing
blocks, which makes them monospaced and avoids further interpretation of
special characters. Some manpages make a list of examples, like:
git foo::
Run git foo.
git foo -q::
Use the "-q" option.
to quickly show many variants. However, they can sometimes be hard to
read, because they are shown in a proportional-width font (so, for
example, seeing the difference between "-- foo" and "--foo" can be
difficult).
This patch puts all such examples into backticks, which gives the
equivalent formatting to a listing block (i.e., monospaced and without
character interpretation).
As a bonus, this also fixes an example in the git-push manpage, in which
"git push origin :::" was accidentally considered a newly-indented list,
and not a list item with "git push origin :" in it.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Otherwise the highlight filter would work on a corrupt byte sequence.
Signed-off-by: å¼ å¿ å±± <zzs213@126.com>
Acked-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This makes it easy to customize the git diff-tree options, for example
to include -p to include inline diffs.
It defaults to the current options "--stat --summary --find-copies-harder"
and thus is backward-compatible.
Signed-off-by: Jon Jensen <jon@endpoint.com>
Improved-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* maint:
add gitignore entry to description about how to write a builtin
gitattributes: Reword "attribute macro" to "macro attribute"
gitattributes: Clarify discussion of attribute macros
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If the author forgets the gitignore entry the built result will show up
as new file in the git working directory.
Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The new wording makes it clearer that such a beast is an attribute in
addition to being a macro (as opposed to being only a macro that is
used for attributes).
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In particular, make it clear that attribute macros are themselves
recorded as attributes in addition to setting other attributes.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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These depend on a working git-upload-archive, which is broken on Windows,
because it depends on fork().
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* vi/make-test-vector-less-specific:
tests: cleanup binary test vector files
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The test4012.png test vector file that was originally used for t4012 to
check operations on binary files was later reused in other tests, making
it no longer consistent to name it after a specific test. Rename it to more
generic "test-binary-1.png".
While at it, rename test9200b to "test-binary-2.png" (even though it is
only used by t9200).
Signed-off-by: Vitaliy Ivanov <vitalivanov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jk/clone-detached:
clone: always fetch remote HEAD
make copy_ref globally available
consider only branches in guess_remote_head
t: add tests for cloning remotes with detached HEAD
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In most cases, fetching the remote HEAD explicitly is
unnecessary. It's just a symref pointing to a branch which
we are already fetching, so we will already ask for its sha1.
However, if the remote has a detached HEAD, things are less
certain. We do not ask for HEAD's sha1, but we do try to
write it into a local detached HEAD. In most cases this is
fine, as the remote HEAD is pointing to some part of the
history graph that we will fetch via the refs.
But if the remote HEAD points to an "orphan" commit (one
which was is not an ancestor of any refs), then we will not
have the object, and update_ref will complain when we try to
write the detached HEAD, aborting the whole clone.
This patch makes clone always explicitly ask the remote for
the sha1 of its HEAD commit. In the non-detached case, this
is a no-op, as we were going to ask for that sha1 anyway. In
the regular detached case, this will add an extra "want" to
the protocol negotiation, but will not change the history
that gets sent. And in the detached orphan case, we will
fetch the orphaned history so that we can write it into our
local detached HEAD.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This is a useful function, and we have already made the
similar alloc_ref and copy_ref_list available.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The guess_remote_head function tries to figure out where a
remote's HEAD is pointing by comparing the sha1 of the
remote's HEAD with the sha1 of various refs found on the
remote. However, we were too liberal in matching refs, and
would match tags or remote tracking branches, even though
these things could not possibly be referenced by the HEAD
symbolic ref (since git will detach when checking them out).
As a result, a clone of a remote repository with a detached
HEAD might write "refs/tags/*" into our local HEAD, which is
bogus. The resulting HEAD should be detached.
The other related code path is remote.c's get_head_names()
(which is used for, among other things, "set-head -a"). This was
not affected, however, as that function feeds only refs from
refs/heads to guess_remote_head.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We didn't test this setup at all, and doing so reveals a few
bugs:
1. Cloning a repository with an orphaned detached HEAD
(i.e., one that points to history that is not
referenced by any ref) will fail.
2. Cloning a repository with a detached HEAD that points
to a tag will cause us to write a bogus "refs/tags/..."
ref into the HEAD symbolic ref. We should probably
detach instead.
3. Cloning a repository with a detached HEAD that points
to a branch will cause us to checkout that branch. This
is a known limitation of the git protocol (we have to
guess at HEAD's destination, since the symref contents
aren't shown to us). This test serves to document the
desired behavior, which can only be achieved once the
git protocol learns to share symref information.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jc/streaming-filter:
streaming: free git_istream upon closing
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Kirill Smelkov noticed that post-1.7.6 "git checkout"
started leaking tons of memory. The streaming_write_entry
function properly calls close_istream(), but that function
did not actually free() the allocated git_istream struct.
The git_istream struct is totally opaque to calling code,
and must be heap-allocated by open_istream. Therefore it's
not appropriate for callers to have to free it.
This patch makes close_istream() into "close and de-allocate
all associated resources". We could add a new "free_istream"
call, but there's not much point in letting callers inspect
the istream after close. And this patch's semantics make us
match fopen/fclose, which is well-known and understood.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* sr/transport-helper-fix: (21 commits)
transport-helper: die early on encountering deleted refs
transport-helper: implement marks location as capability
transport-helper: Use capname for refspec capability too
transport-helper: change import semantics
transport-helper: update ref status after push with export
transport-helper: use the new done feature where possible
transport-helper: check status code of finish_command
transport-helper: factor out push_update_refs_status
fast-export: support done feature
fast-import: introduce 'done' command
git-remote-testgit: fix error handling
git-remote-testgit: only push for non-local repositories
remote-curl: accept empty line as terminator
remote-helpers: export GIT_DIR variable to helpers
git_remote_helpers: push all refs during a non-local export
transport-helper: don't feed bogus refs to export push
git-remote-testgit: import non-HEAD refs
t5800: document some non-functional parts of remote helpers
t5800: use skip_all instead of prereq
t5800: factor out some ref tests
...
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Remote helpers do not support deleting refs by means of the 'export'
command sincethe fast-import protocol does not support it.
Check explicitly for deleted refs and die early.
Signed-off-by: Sverre Rabbelier <srabbelier@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Now that the gitdir location is exported as an environment variable
this can be implemented elegantly without requiring any explicit
flushes nor an ad-hoc exchange of values.
Signed-off-by: Sverre Rabbelier <srabbelier@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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