Merge tag 'char-misc-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc updates from Greg KH:
 "Here's the big set of char/misc patches for 4.5-rc1.

  Nothing major, lots of different driver subsystem updates, full
  details in the shortlog.  All of these have been in linux-next for a
  while"

* tag 'char-misc-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (71 commits)
  mei: fix fasync return value on error
  parport: avoid assignment in if
  parport: remove unneeded space
  parport: change style of NULL comparison
  parport: remove unnecessary out of memory message
  parport: remove braces
  parport: quoted strings should not be split
  parport: code indent should use tabs
  parport: fix coding style
  parport: EXPORT_SYMBOL should follow function
  parport: remove trailing white space
  parport: fix a trivial typo
  coresight: Fix a typo in Kconfig
  coresight: checking for NULL string in coresight_name_match()
  Drivers: hv: vmbus: Treat Fibre Channel devices as performance critical
  Drivers: hv: utils: fix hvt_op_poll() return value on transport destroy
  Drivers: hv: vmbus: fix the building warning with hyperv-keyboard
  extcon: add Maxim MAX3355 driver
  Drivers: hv: ring_buffer: eliminate hv_ringbuffer_peek()
  Drivers: hv: remove code duplication between vmbus_recvpacket()/vmbus_recvpacket_raw()
  ...

2 files changed, 187 insertions, 49 deletions

diff --git a/scripts/checkkconfigsymbols.py b/scripts/checkkconfigsymbols.py
index 2f4b7ffd5570..d8f6c094cce5 100755
--- a/scripts/checkkconfigsymbols.py
+++ b/scripts/checkkconfigsymbols.py
@@ -8,11 +8,14 @@
 # Licensed under the terms of the GNU GPL License version 2
 
 
+import difflib
 import os
 import re
+import signal
 import sys
-from subprocess import Popen, PIPE, STDOUT
+from multiprocessing import Pool, cpu_count
 from optparse import OptionParser
+from subprocess import Popen, PIPE, STDOUT
 
 
 # regex expressions
@@ -26,7 +29,7 @@ SOURCE_FEATURE = r"(?:\W|\b)+[D]{,1}CONFIG_(" + FEATURE + r")"
 
 # regex objects
 REGEX_FILE_KCONFIG = re.compile(r".*Kconfig[\.\w+\-]*$")
-REGEX_FEATURE = re.compile(r'(?!\B"[^"]*)' + FEATURE + r'(?![^"]*"\B)')
+REGEX_FEATURE = re.compile(r'(?!\B)' + FEATURE + r'(?!\B)')
 REGEX_SOURCE_FEATURE = re.compile(SOURCE_FEATURE)
 REGEX_KCONFIG_DEF = re.compile(DEF)
 REGEX_KCONFIG_EXPR = re.compile(EXPR)
@@ -34,6 +37,7 @@ REGEX_KCONFIG_STMT = re.compile(STMT)
 REGEX_KCONFIG_HELP = re.compile(r"^\s+(help|---help---)\s*$")
 REGEX_FILTER_FEATURES = re.compile(r"[A-Za-z0-9]$")
 REGEX_NUMERIC = re.compile(r"0[xX][0-9a-fA-F]+|[0-9]+")
+REGEX_QUOTES = re.compile("(\"(.*?)\")")
 
 
 def parse_options():
@@ -71,6 +75,9 @@ def parse_options():
                            "the pattern needs to be a Python regex.  To "
                            "ignore defconfigs, specify -i '.*defconfig'.")
 
+    parser.add_option('-s', '--sim', dest='sim', action='store', default="",
+                      help="Print a list of maximum 10 string-similar symbols.")
+
     parser.add_option('', '--force', dest='force', action='store_true',
                       default=False,
                       help="Reset current Git tree even when it's dirty.")
@@ -109,6 +116,18 @@ def main():
     """Main function of this module."""
     opts = parse_options()
 
+    if opts.sim and not opts.commit and not opts.diff:
+        sims = find_sims(opts.sim, opts.ignore)
+        if sims:
+            print "%s: %s" % (yel("Similar symbols"), ', '.join(sims))
+        else:
+            print "%s: no similar symbols found" % yel("Similar symbols")
+        sys.exit(0)
+
+    # dictionary of (un)defined symbols
+    defined = {}
+    undefined = {}
+
     if opts.commit or opts.diff:
         head = get_head()
 
@@ -127,40 +146,56 @@ def main():
 
         # get undefined items before the commit
         execute("git reset --hard %s" % commit_a)
-        undefined_a = check_symbols(opts.ignore)
+        undefined_a, _ = check_symbols(opts.ignore)
 
         # get undefined items for the commit
         execute("git reset --hard %s" % commit_b)
-        undefined_b = check_symbols(opts.ignore)
+        undefined_b, defined = check_symbols(opts.ignore)
 
         # report cases that are present for the commit but not before
         for feature in sorted(undefined_b):
             # feature has not been undefined before
             if not feature in undefined_a:
                 files = sorted(undefined_b.get(feature))
-                print "%s\t%s" % (yel(feature), ", ".join(files))
-                if opts.find:
-                    commits = find_commits(feature, opts.diff)
-                    print red(commits)
+                undefined[feature] = files
             # check if there are new files that reference the undefined feature
             else:
                 files = sorted(undefined_b.get(feature) -
                                undefined_a.get(feature))
                 if files:
-                    print "%s\t%s" % (yel(feature), ", ".join(files))
-                    if opts.find:
-                        commits = find_commits(feature, opts.diff)
-                        print red(commits)
+                    undefined[feature] = files
 
         # reset to head
         execute("git reset --hard %s" % head)
 
     # default to check the entire tree
     else:
-        undefined = check_symbols(opts.ignore)
-        for feature in sorted(undefined):
-            files = sorted(undefined.get(feature))
-            print "%s\t%s" % (yel(feature), ", ".join(files))
+        undefined, defined = check_symbols(opts.ignore)
+
+    # now print the output
+    for feature in sorted(undefined):
+        print red(feature)
+
+        files = sorted(undefined.get(feature))
+        print "%s: %s" % (yel("Referencing files"), ", ".join(files))
+
+        sims = find_sims(feature, opts.ignore, defined)
+        sims_out = yel("Similar symbols")
+        if sims:
+            print "%s: %s" % (sims_out, ', '.join(sims))
+        else:
+            print "%s: %s" % (sims_out, "no similar symbols found")
+
+        if opts.find:
+            print "%s:" % yel("Commits changing symbol")
+            commits = find_commits(feature, opts.diff)
+            if commits:
+                for commit in commits:
+                    commit = commit.split(" ", 1)
+                    print "\t- %s (\"%s\")" % (yel(commit[0]), commit[1])
+            else:
+                print "\t- no commit found"
+        print  #  new line
 
 
 def yel(string):
@@ -190,7 +225,7 @@ def find_commits(symbol, diff):
     """Find commits changing %symbol in the given range of %diff."""
     commits = execute("git log --pretty=oneline --abbrev-commit -G %s %s"
                       % (symbol, diff))
-    return commits
+    return [x for x in commits.split("\n") if x]
 
 
 def tree_is_dirty():
@@ -209,43 +244,107 @@ def get_head():
     return stdout.strip('\n')
 
 
-def check_symbols(ignore):
-    """Find undefined Kconfig symbols and return a dict with the symbol as key
-    and a list of referencing files as value.  Files matching %ignore are not
-    checked for undefined symbols."""
-    source_files = []
-    kconfig_files = []
-    defined_features = set()
-    referenced_features = dict()  # {feature: [files]}
+def partition(lst, size):
+    """Partition list @lst into eveni-sized lists of size @size."""
+    return [lst[i::size] for i in xrange(size)]
+
+
+def init_worker():
+    """Set signal handler to ignore SIGINT."""
+    signal.signal(signal.SIGINT, signal.SIG_IGN)
+
+
+def find_sims(symbol, ignore, defined = []):
+    """Return a list of max. ten Kconfig symbols that are string-similar to
+    @symbol."""
+    if defined:
+        return sorted(difflib.get_close_matches(symbol, set(defined), 10))
+
+    pool = Pool(cpu_count(), init_worker)
+    kfiles = []
+    for gitfile in get_files():
+        if REGEX_FILE_KCONFIG.match(gitfile):
+            kfiles.append(gitfile)
 
+    arglist = []
+    for part in partition(kfiles, cpu_count()):
+        arglist.append((part, ignore))
+
+    for res in pool.map(parse_kconfig_files, arglist):
+        defined.extend(res[0])
+
+    return sorted(difflib.get_close_matches(symbol, set(defined), 10))
+
+
+def get_files():
+    """Return a list of all files in the current git directory."""
     # use 'git ls-files' to get the worklist
     stdout = execute("git ls-files")
     if len(stdout) > 0 and stdout[-1] == "\n":
         stdout = stdout[:-1]
 
+    files = []
     for gitfile in stdout.rsplit("\n"):
         if ".git" in gitfile or "ChangeLog" in gitfile or      \
                 ".log" in gitfile or os.path.isdir(gitfile) or \
                 gitfile.startswith("tools/"):
             continue
+        files.append(gitfile)
+    return files
+
+
+def check_symbols(ignore):
+    """Find undefined Kconfig symbols and return a dict with the symbol as key
+    and a list of referencing files as value.  Files matching %ignore are not
+    checked for undefined symbols."""
+    pool = Pool(cpu_count(), init_worker)
+    try:
+        return check_symbols_helper(pool, ignore)
+    except KeyboardInterrupt:
+        pool.terminate()
+        pool.join()
+        sys.exit(1)
+
+
+def check_symbols_helper(pool, ignore):
+    """Helper method for check_symbols().  Used to catch keyboard interrupts in
+    check_symbols() in order to properly terminate running worker processes."""
+    source_files = []
+    kconfig_files = []
+    defined_features = []
+    referenced_features = dict()  # {file: [features]}
+
+    for gitfile in get_files():
         if REGEX_FILE_KCONFIG.match(gitfile):
             kconfig_files.append(gitfile)
         else:
-            # all non-Kconfig files are checked for consistency
+            if ignore and not re.match(ignore, gitfile):
+                continue
+            # add source files that do not match the ignore pattern
             source_files.append(gitfile)
 
-    for sfile in source_files:
-        if ignore and re.match(ignore, sfile):
-            # do not check files matching %ignore
-            continue
-        parse_source_file(sfile, referenced_features)
+    # parse source files
+    arglist = partition(source_files, cpu_count())
+    for res in pool.map(parse_source_files, arglist):
+        referenced_features.update(res)
 
-    for kfile in kconfig_files:
-        if ignore and re.match(ignore, kfile):
-            # do not collect references for files matching %ignore
-            parse_kconfig_file(kfile, defined_features, dict())
-        else:
-            parse_kconfig_file(kfile, defined_features, referenced_features)
+
+    # parse kconfig files
+    arglist = []
+    for part in partition(kconfig_files, cpu_count()):
+        arglist.append((part, ignore))
+    for res in pool.map(parse_kconfig_files, arglist):
+        defined_features.extend(res[0])
+        referenced_features.update(res[1])
+    defined_features = set(defined_features)
+
+    # inverse mapping of referenced_features to dict(feature: [files])
+    inv_map = dict()
+    for _file, features in referenced_features.iteritems():
+        for feature in features:
+            inv_map[feature] = inv_map.get(feature, set())
+            inv_map[feature].add(_file)
+    referenced_features = inv_map
 
     undefined = {}  # {feature: [files]}
     for feature in sorted(referenced_features):
@@ -259,12 +358,26 @@ def check_symbols(ignore):
                 if feature[:-len("_MODULE")] in defined_features:
                     continue
             undefined[feature] = referenced_features.get(feature)
-    return undefined
+    return undefined, defined_features
 
 
-def parse_source_file(sfile, referenced_features):
-    """Parse @sfile for referenced Kconfig features."""
+def parse_source_files(source_files):
+    """Parse each source file in @source_files and return dictionary with source
+    files as keys and lists of references Kconfig symbols as values."""
+    referenced_features = dict()
+    for sfile in source_files:
+        referenced_features[sfile] = parse_source_file(sfile)
+    return referenced_features
+
+
+def parse_source_file(sfile):
+    """Parse @sfile and return a list of referenced Kconfig features."""
     lines = []
+    references = []
+
+    if not os.path.exists(sfile):
+        return references
+
     with open(sfile, "r") as stream:
         lines = stream.readlines()
 
@@ -275,9 +388,9 @@ def parse_source_file(sfile, referenced_features):
         for feature in features:
             if not REGEX_FILTER_FEATURES.search(feature):
                 continue
-            sfiles = referenced_features.get(feature, set())
-            sfiles.add(sfile)
-            referenced_features[feature] = sfiles
+            references.append(feature)
+
+    return references
 
 
 def get_features_in_line(line):
@@ -285,11 +398,35 @@ def get_features_in_line(line):
     return REGEX_FEATURE.findall(line)
 
 
-def parse_kconfig_file(kfile, defined_features, referenced_features):
+def parse_kconfig_files(args):
+    """Parse kconfig files and return tuple of defined and references Kconfig
+    symbols.  Note, @args is a tuple of a list of files and the @ignore
+    pattern."""
+    kconfig_files = args[0]
+    ignore = args[1]
+    defined_features = []
+    referenced_features = dict()
+
+    for kfile in kconfig_files:
+        defined, references = parse_kconfig_file(kfile)
+        defined_features.extend(defined)
+        if ignore and re.match(ignore, kfile):
+            # do not collect references for files that match the ignore pattern
+            continue
+        referenced_features[kfile] = references
+    return (defined_features, referenced_features)
+
+
+def parse_kconfig_file(kfile):
     """Parse @kfile and update feature definitions and references."""
     lines = []
+    defined = []
+    references = []
     skip = False
 
+    if not os.path.exists(kfile):
+        return defined, references
+
     with open(kfile, "r") as stream:
         lines = stream.readlines()
 
@@ -300,7 +437,7 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
 
         if REGEX_KCONFIG_DEF.match(line):
             feature_def = REGEX_KCONFIG_DEF.findall(line)
-            defined_features.add(feature_def[0])
+            defined.append(feature_def[0])
             skip = False
         elif REGEX_KCONFIG_HELP.match(line):
             skip = True
@@ -308,6 +445,7 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
             # ignore content of help messages
             pass
         elif REGEX_KCONFIG_STMT.match(line):
+            line = REGEX_QUOTES.sub("", line)
             features = get_features_in_line(line)
             # multi-line statements
             while line.endswith("\\"):
@@ -319,9 +457,9 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
                 if REGEX_NUMERIC.match(feature):
                     # ignore numeric values
                     continue
-                paths = referenced_features.get(feature, set())
-                paths.add(kfile)
-                referenced_features[feature] = paths
+                references.append(feature)
+
+    return defined, references
 
 
 if __name__ == "__main__":
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 5b96206e9aab..8adca4406198 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -917,7 +917,7 @@ static int do_vmbus_entry(const char *filename, void *symval,
         char guid_name[(sizeof(*guid) + 1) * 2];
 
         for (i = 0; i < (sizeof(*guid) * 2); i += 2)
-                sprintf(&guid_name[i], "%02x", TO_NATIVE((*guid)[i/2]));
+                sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
 
         strcpy(alias, "vmbus:");
         strcat(alias, guid_name);