#!/usr/bin/python
#
# diffconfig - a tool to compare .config files.
#
# originally written in 2006 by Matt Mackall
#  (at least, this was in his bloatwatch source code)
# last worked on 2008 by Tim Bird
#

import sys, os

def usage():
    print("""Usage: diffconfig [-h] [-m] [<config1> <config2>]

Diffconfig is a simple utility for comparing two .config files.
Using standard diff to compare .config files often includes extraneous and
distracting information.  This utility produces sorted output with only the
changes in configuration values between the two files.

Added and removed items are shown with a leading plus or minus, respectively.
Changed items show the old and new values on a single line.

If -m is specified, then output will be in "merge" style, which has the
changed and new values in kernel config option format.

If no config files are specified, .config and .config.old are used.

Example usage:
 $ diffconfig .config config-with-some-changes
-EXT2_FS_XATTR  n
 CRAMFS  n -> y
 EXT2_FS  y -> n
 LOG_BUF_SHIFT  14 -> 16
 PRINTK_TIME  n -> y
""")
    sys.exit(0)

# returns a dictionary of name/value pairs for config items in the file
def readconfig(config_file):
    d = {}
    for line in config_file:
        line = line[:-1]
        if line[:7] == "CONFIG_":
            name, val = line[7:].split("=", 1)
            d[name] = val
        if line[-11:] == " is not set":
            d[line[9:-11]] = "n"
    return d

def print_config(op, config, value, new_value):
    global merge_style

    if merge_style:
        if new_value:
            if new_value=="n":
                print("# CONFIG_%s is not set" % config)
            else:
                print("CONFIG_%s=%s" % (config, new_value))
    else:
        if op=="-":
            print("-%s %s" % (config, value))
        elif op=="+":
            print("+%s %s" % (config, new_value))
        else:
            print(" %s %s -> %s" % (config, value, new_value))

def main():
    global merge_style

    # parse command line args
    if ("-h" in sys.argv or "--help" in sys.argv):
        usage()

    merge_style = 0
    if "-m" in sys.argv:
        merge_style = 1
        sys.argv.remove("-m")

    argc = len(sys.argv)
    if not (argc==1 or argc == 3):
        print("Error: incorrect number of arguments or unrecognized option")
        usage()

    if argc == 1:
        # if no filenames given, assume .config and .config.old
        build_dir=""
        if "KBUILD_OUTPUT" in os.environ:
            build_dir = os.environ["KBUILD_OUTPUT"]+"/"
        configa_filename = build_dir + ".config.old"
        configb_filename = build_dir + ".config"
    else:
        configa_filename = sys.argv[1]
        configb_filename = sys.argv[2]

    try:
        a = readconfig(open(configa_filename))
        b = readconfig(open(configb_filename))
    except (IOError):
        e = sys.exc_info()[1]
        print("I/O error[%s]: %s\n" % (e.args[0],e.args[1]))
        usage()

    # print items in a but not b (accumulate, sort and print)
    old = []
    for config in a:
        if config not in b:
            old.append(config)
    old.sort()
    for config in old:
        print_config("-", config, a[config], None)
        del a[config]

    # print items that changed (accumulate, sort, and print)
    changed = []
    for config in a:
        if a[config] != b[config]:
            changed.append(config)
        else:
            del b[config]
    changed.sort()
    for config in changed:
        print_config("->", config, a[config], b[config])
        del b[config]

    # now print items in b but not in a
    # (items from b that were in a were removed above)
    new = sorted(b.keys())
    for config in new:
        print_config("+", config, None, b[config])

main()
ue='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Dexuan Cui &lt;decui@microsoft.com&gt;</td><td class='right'>2017-01-28 11:46:02 -0700</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-31 10:59:48 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/drm/i2c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>433e19cf33d34bb6751c874a9c00980552fe508c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/drm/i2c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=433e19cf33d34bb6751c874a9c00980552fe508c'>ce6547ef2987fbb289fa28f03536328a42781651</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/drm/i2c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>include/drm/i2c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/drm/i2c?id=191e885a2e130e639bb0c8ee350d7047294f2ce6'>191e885a2e130e639bb0c8ee350d7047294f2ce6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/drm/i2c?id=433e19cf33d34bb6751c874a9c00980552fe508c&amp;id2=191e885a2e130e639bb0c8ee350d7047294f2ce6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()</div><div class='commit-msg'>Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")
added the proper mb(), but removed the test "prev_write_sz &lt; pending_sz"
when making the signal decision.

As a result, the guest can signal the host unnecessarily,
and then the host can throttle the guest because the host
thinks the guest is buggy or malicious; finally the user
running stress test can perceive intermittent freeze of
the guest.

This patch brings back the test, and properly handles the
in-place consumption APIs used by NetVSC (see get_next_pkt_raw(),
put_pkt_raw() and commit_rd_index()).

Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")

Signed-off-by: Dexuan Cui &lt;decui@microsoft.com&gt;
Reported-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Tested-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Cc: "K. Y. Srinivasan" &lt;kys@microsoft.com&gt;
Cc: Haiyang Zhang &lt;haiyangz@microsoft.com&gt;
Cc: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=433e19cf33d34bb6751c874a9c00980552fe508c'>Diffstat</a> (limited to 'include/drm/i2c')</div><table summary='diffstat' class='diffstat'>