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Date: Wed, 26 Jan 2022 12:22:46 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Lucas De Marchi <lucas.demarchi@...el.com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
intel-gfx <intel-gfx@...ts.freedesktop.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
amd-gfx@...ts.freedesktop.org,
linux-security-module <linux-security-module@...r.kernel.org>,
nouveau@...ts.freedesktop.org, netdev <netdev@...r.kernel.org>,
Alex Deucher <alexander.deucher@....com>,
Andrew Morton <akpm@...ux-foundation.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Ben Skeggs <bskeggs@...hat.com>,
Christian König <christian.koenig@....com>,
Chris Wilson <chris@...is-wilson.co.uk>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...ux.ie>,
"David S. Miller" <davem@...emloft.net>,
Emma Anholt <emma@...olt.net>,
Francis Laniel <laniel_francis@...vacyrequired.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Harry Wentland <harry.wentland@....com>,
Jakub Kicinski <kuba@...nel.org>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Julia Lawall <julia.lawall@...6.fr>,
Kentaro Takeda <takedakn@...data.co.jp>,
Leo Li <sunpeng.li@....com>, Petr Mladek <pmladek@...e.com>,
Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>,
Raju Rangoju <rajur@...lsio.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Vishal Kulkarni <vishal@...lsio.com>
Subject: Re: [PATCH v2 00/11] lib/string_helpers: Add a few string helpers
On Wed, Jan 26, 2022 at 11:39 AM Lucas De Marchi
<lucas.demarchi@...el.com> wrote:
>
> Add some helpers under lib/string_helpers.h so they can be used
> throughout the kernel. When I started doing this there were 2 other
> previous attempts I know of, not counting the iterations each of them
> had:
>
> 1) https://lore.kernel.org/all/20191023131308.9420-1-jani.nikula@intel.com/
> 2) https://lore.kernel.org/all/20210215142137.64476-1-andriy.shevchenko@linux.intel.com/#t
>
> Now there is also the v1 of this same patch series:
> https://lore.kernel.org/all/20220119072450.2890107-1-lucas.demarchi@intel.com/
>
> Going through the comments I tried to find some common ground and
> justification for what is in here, addressing some of the concerns
> raised.
>
> a. This version should be a drop-in replacement for what is currently in
> the tree, with no change in behavior or binary size. For binary
> size what I checked was that the linked objects in the end have the
> same size (gcc 11). From comments in the previous attempts this seems
> also the case for earlier compiler versions
>
> b. I didn't change the function name to choice_* as suggested by Andrew
> Morton in 20191023155619.43e0013f0c8c673a5c508c1e@...ux-foundation.org
> because other people argumented in favor of shorter names for these
> simple helpers - if they are long and people simply not use due to
> that, we failed. However as pointed out in v1 of this patchseries,
> onoff(), yesno(), enabledisable(), enableddisabled() have some
> issues: the last 2 are hard to read and for the first 2 it would not
> be hard to have the symbol to clash with variable names.
> From comments in v1, most people were in favor (or at least not
> opposed) to using str_on_off(), str_yes_no(), str_enable_disable()
> and str_enabled_disabled().
>
> c. Use string_helper.h for these helpers - pulling string.h in the
> compilations units was one of the concerns and I think re-using this
> already existing header is better than creating a new string-choice.h
>
> d. One alternative to all of this suggested by Christian König
> (43456ba7-c372-84cc-4949-dcb817188e21@....com) would be to add a
> printk format. But besides the comment, he also seemed to like
> the common function. This brought the argument from others that the
> simple yesno()/enabledisable() already used in the code (or new
> renamed version) is easier to remember and use than e.g. %py[DOY]
I do not see any impediments to this series to be pulled.
Thanks for the work you've done!
> Changes in v2:
>
> - Use str_ prefix and separate other words with underscore: it's a
> little bit longer, but should improve readability
>
> - Patches we re-split due to the rename: first patch adds all the new
> functions, then additional patches try to do one conversion at a
> time. While doing so, there were some fixes for issues already
> present along the way
>
> - Style suggestions from v1 were adopted
>
> In v1 it was suggested to apply this in drm-misc. I will leave this to
> maintainers to decide: maybe it would be simpler to merge the first
> patches on drm-intel-next, wait for the back merge and merge the rest
> through drm-misc - my fear is a big conflict with other work going in
> drm-intel-next since the bulk of the rename is there.
>
> I tried to figure out acks and reviews from v1 and apply them to how the
> patches are now split.
>
> thanks
> Lucas De Marchi
>
> Lucas De Marchi (11):
> lib/string_helpers: Consolidate string helpers implementation
> drm/i915: Fix trailing semicolon
> drm/i915: Use str_yes_no()
> drm/i915: Use str_enable_disable()
> drm/i915: Use str_enabled_disabled()
> drm/i915: Use str_on_off()
> drm/amd/display: Use str_yes_no()
> drm/gem: Sort includes alphabetically
> drm: Convert open-coded yes/no strings to yesno()
> tomoyo: Use str_yes_no()
> cxgb4: Use str_yes_no()
>
> drivers/gpu/drm/amd/amdgpu/atom.c | 4 +-
> .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 14 +-
> drivers/gpu/drm/dp/drm_dp.c | 3 +-
> drivers/gpu/drm/drm_client_modeset.c | 3 +-
> drivers/gpu/drm/drm_gem.c | 23 +-
> drivers/gpu/drm/i915/display/g4x_dp.c | 6 +-
> .../gpu/drm/i915/display/intel_backlight.c | 3 +-
> drivers/gpu/drm/i915/display/intel_ddi.c | 4 +-
> drivers/gpu/drm/i915/display/intel_display.c | 46 ++--
> .../drm/i915/display/intel_display_debugfs.c | 74 +++---
> .../drm/i915/display/intel_display_power.c | 4 +-
> .../drm/i915/display/intel_display_trace.h | 9 +-
> drivers/gpu/drm/i915/display/intel_dp.c | 20 +-
> drivers/gpu/drm/i915/display/intel_dpll.c | 3 +-
> drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 7 +-
> drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 7 +-
> drivers/gpu/drm/i915/display/intel_fbc.c | 4 +-
> drivers/gpu/drm/i915/display/intel_fdi.c | 8 +-
> drivers/gpu/drm/i915/display/intel_hdmi.c | 3 +-
> drivers/gpu/drm/i915/display/intel_sprite.c | 6 +-
> drivers/gpu/drm/i915/display/vlv_dsi_pll.c | 3 +-
> .../gpu/drm/i915/gem/selftests/huge_pages.c | 9 +-
> .../drm/i915/gem/selftests/i915_gem_context.c | 7 +-
> drivers/gpu/drm/i915/gt/intel_breadcrumbs.c | 3 +-
> drivers/gpu/drm/i915/gt/intel_engine_cs.c | 11 +-
> .../drm/i915/gt/intel_execlists_submission.c | 7 +-
> drivers/gpu/drm/i915/gt/intel_gt_pm.c | 3 +-
> drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c | 52 ++--
> drivers/gpu/drm/i915/gt/intel_rc6.c | 5 +-
> drivers/gpu/drm/i915/gt/intel_reset.c | 3 +-
> drivers/gpu/drm/i915/gt/intel_rps.c | 13 +-
> drivers/gpu/drm/i915/gt/intel_sseu.c | 9 +-
> drivers/gpu/drm/i915/gt/intel_sseu_debugfs.c | 10 +-
> drivers/gpu/drm/i915/gt/selftest_timeline.c | 3 +-
> drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 5 +-
> drivers/gpu/drm/i915/gt/uc/intel_guc_log.c | 5 +-
> drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c | 6 +-
> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 4 +-
> drivers/gpu/drm/i915/gt/uc/intel_uc.c | 14 +-
> drivers/gpu/drm/i915/gt/uc/intel_uc_debugfs.c | 20 +-
> drivers/gpu/drm/i915/i915_debugfs.c | 17 +-
> drivers/gpu/drm/i915/i915_driver.c | 4 +-
> drivers/gpu/drm/i915/i915_gpu_error.c | 9 +-
> drivers/gpu/drm/i915/i915_params.c | 5 +-
> drivers/gpu/drm/i915/i915_utils.h | 21 +-
> drivers/gpu/drm/i915/intel_device_info.c | 8 +-
> drivers/gpu/drm/i915/intel_dram.c | 10 +-
> drivers/gpu/drm/i915/intel_pm.c | 14 +-
> drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c | 4 +-
> drivers/gpu/drm/i915/selftests/i915_active.c | 3 +-
> drivers/gpu/drm/i915/vlv_suspend.c | 3 +-
> drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c | 5 +-
> drivers/gpu/drm/radeon/atom.c | 3 +-
> drivers/gpu/drm/v3d/v3d_debugfs.c | 11 +-
> drivers/gpu/drm/virtio/virtgpu_debugfs.c | 4 +-
> .../ethernet/chelsio/cxgb4/cxgb4_debugfs.c | 249 ++++++++++--------
> include/linux/string_helpers.h | 20 ++
> security/tomoyo/audit.c | 2 +-
> security/tomoyo/common.c | 19 +-
> security/tomoyo/common.h | 1 -
> 60 files changed, 482 insertions(+), 373 deletions(-)
>
> --
> 2.34.1
>
--
With Best Regards,
Andy Shevchenko
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