On Wed, Jan 26, 2022 at 11:39 AM Lucas De Marchi lucas.demarchi@intel.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:
- https://lore.kernel.org/all/20191023131308.9420-1-jani.nikula@intel.com/
- https://lore.kernel.org/all/20210215142137.64476-1-andriy.shevchenko@linux.i...
Now there is also the v1 of this same patch series: https://lore.kernel.org/all/20220119072450.2890107-1-lucas.demarchi@intel.co...
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@linux-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@amd.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