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Joe Perches e33c9fe8b8 get_maintainer: fix unexpected behavior for path/to//file (double slashes) 
get_maintainer behaves differently if there is a double sequential forward
slash in a filename because the total number of slashes in a filename is
used to match MAINTAINERS file patterns.

For example:

(with double slash)
  $ ./scripts/get_maintainer.pl -f drivers/gpu/drm//lima
  David Airlie <airlied@linux.ie> (maintainer:DRM DRIVERS)
  Daniel Vetter <daniel@ffwll.ch> (maintainer:DRM DRIVERS,commit_signer:3/42=7%)
  Qiang Yu <yuq825@gmail.com> (commit_signer:36/42=86%,authored:24/42=57%)
  Vasily Khoruzhick <anarsoul@gmail.com> (commit_signer:26/42=62%)
  Krzysztof Kozlowski <krzk@kernel.org> (commit_signer:5/42=12%,authored:5/42=12%)
  Emil Velikov <emil.velikov@collabora.com> (commit_signer:4/42=10%)
  dri-devel@lists.freedesktop.org (open list:DRM DRIVERS)
  linux-kernel@vger.kernel.org (open list)

(without double slash)
  $ ./scripts/get_maintainer.pl -f drivers/gpu/drm/lima
  Qiang Yu <yuq825@gmail.com> (maintainer:DRM DRIVERS FOR LIMA)
  David Airlie <airlied@linux.ie> (maintainer:DRM DRIVERS)
  Daniel Vetter <daniel@ffwll.ch> (maintainer:DRM DRIVERS)
  dri-devel@lists.freedesktop.org (open list:DRM DRIVERS FOR LIMA)
  lima@lists.freedesktop.org (moderated list:DRM DRIVERS FOR LIMA)
  linux-kernel@vger.kernel.org (open list)

So reduce consecutive double slashes to a single slash
by using File::Spec->canonpath().

from: https://perldoc.perl.org/File/Spec/Unix.html

canonpath()

No physical check on the filesystem, but a logical cleanup of a path.  On
UNIX eliminates successive slashes and successive "/.".

Reported-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/9a18b611813bb409fef15bc8927adab79eb9be43.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2020-06-04 19:06:24 -07:00
Documentation mm/debug: add tests validating architecture page table helpers 2020-06-04 19:06:21 -07:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
arch powerpc/pseries/hotplug-memory: stop checking is_mem_section_removable() 2020-06-04 19:06:23 -07:00
block for-5.8/drivers-2020-06-01 2020-06-02 15:37:03 -07:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto crypto: engine - do not requeue in case of fatal error 2020-05-28 17:27:52 +10:00
drivers zcomp: Use ARRAY_SIZE() for backends list 2020-06-04 19:06:24 -07:00
fs proc: rename "catch" function argument 2020-06-04 19:06:24 -07:00
include include/linux/mm.h: return true in cpupid_pid_unset() 2020-06-04 19:06:24 -07:00
init Merge branch 'akpm' (patches from Andrew) 2020-06-03 20:24:15 -07:00
ipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
kernel user.c: make uidhash_table static 2020-06-04 19:06:24 -07:00
lib mm/debug: add tests validating architecture page table helpers 2020-06-04 19:06:21 -07:00
mm mm: use false for bool variable 2020-06-04 19:06:24 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
scripts get_maintainer: fix unexpected behavior for path/to//file (double slashes) 2020-06-04 19:06:24 -07:00
security mm: add kvfree_sensitive() for freeing sensitive data objects 2020-06-04 19:06:22 -07:00
sound MIPS updates for v5.8: 2020-06-03 13:32:21 -07:00
tools Merge branch 'akpm' (patches from Andrew) 2020-06-03 20:24:15 -07:00
usr kbuild: fix comment about missing include guard detection 2020-04-11 12:09:48 +09:00
virt A fair amount of stuff this time around, dominated by yet another massive 2020-06-01 15:45:27 -07:00
.clang-format block: add bio_for_each_bvec_all() 2020-05-25 11:25:24 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
.mailmap A fair amount of stuff this time around, dominated by yet another massive 2020-06-01 15:45:27 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS mailmap: change email for Ricardo Ribalda 2020-05-25 18:59:59 -06:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS media updates for v5.8-rc1 2020-06-03 20:59:38 -07:00
Makefile arm64 updates for 5.8 2020-06-01 15:18:27 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.