linux-kernel - [PATCH v2 00/13 6.1.y] Backport minmax.h updates from v6.17-rc7

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Message-ID: <20250929183358.18982-1-farbere@amazon.com>
Date: Mon, 29 Sep 2025 18:33:45 +0000
From: Eliav Farber <farbere@...zon.com>
To: <gregkh@...uxfoundation.org>, <sashal@...nel.org>,
	<mario.limonciello@....com>, <lijo.lazar@....com>, <David.Laight@...LAB.COM>,
	<arnd@...nel.org>, <linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>,
	<farbere@...zon.com>
Subject: [PATCH v2 00/13 6.1.y] Backport minmax.h updates from v6.17-rc7

This series backports 13 patches to update minmax.h in the 6.1.y branch,
aligning it with v6.17-rc7.

The ultimate goal is to synchronize all longterm branches so that they
include the full set of minmax.h changes (6.12.y was already aligned and
6.6.y is in progress).

The key motivation is to bring in commit d03eba99f5bf ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness"), which
is missing in older kernels.

In mainline, this change enables min()/max()/clamp() to accept mixed
argument types, provided both have the same signedness. Without it,
backported patches that use these forms may trigger compiler warnings,
which escalate to build failures when -Werror is enabled.

Changes between v1 and v2:
- v1 included 19 patches:
  https://lore.kernel.org/stable/20250924202320.32333-1-farbere@amazon.com/
- First 6 were pushed to the stable-tree.
- 7th cauded amd driver's build to fail.
- This change fixes it.
- Modified files:
   drivers/gpu/drm/amd/amdgpu/amdgpu.h
   drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
   drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
   drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c

David Laight (7):
  minmax.h: add whitespace around operators and after commas
  minmax.h: update some comments
  minmax.h: reduce the #define expansion of min(), max() and clamp()
  minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
  minmax.h: move all the clamp() definitions after the min/max() ones
  minmax.h: simplify the variants of clamp()
  minmax.h: remove some #defines that are only expanded once

Linus Torvalds (6):
  minmax: make generic MIN() and MAX() macros available everywhere
  minmax: add a few more MIN_T/MAX_T users
  minmax: simplify min()/max()/clamp() implementation
  minmax: don't use max() in situations that want a C constant
    expression
  minmax: improve macro expansion and type checking
  minmax: fix up min3() and max3() too

 arch/um/drivers/mconsole_user.c               |   2 +
 arch/x86/mm/pgtable.c                         |   2 +-
 drivers/edac/sb_edac.c                        |   4 +-
 drivers/edac/skx_common.h                     |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |   2 +
 .../drm/amd/display/modules/hdcp/hdcp_ddc.c   |   2 +
 .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h    |  14 +-
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   |   2 +
 .../drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c  |   3 +
 .../drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c  |   3 +
 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c        |   2 +-
 drivers/gpu/drm/drm_color_mgmt.c              |   2 +-
 drivers/gpu/drm/radeon/evergreen_cs.c         |   2 +
 drivers/hwmon/adt7475.c                       |  24 +-
 drivers/input/touchscreen/cyttsp4_core.c      |   2 +-
 drivers/irqchip/irq-sun6i-r.c                 |   2 +-
 drivers/md/dm-integrity.c                     |   2 +-
 drivers/media/dvb-frontends/stv0367_priv.h    |   3 +
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |   2 +-
 drivers/net/fjes/fjes_main.c                  |   4 +-
 drivers/nfc/pn544/i2c.c                       |   2 -
 drivers/platform/x86/sony-laptop.c            |   1 -
 drivers/scsi/isci/init.c                      |   6 +-
 .../pci/hive_isp_css_include/math_support.h   |   5 -
 fs/btrfs/tree-checker.c                       |   2 +-
 include/linux/compiler.h                      |   9 +
 include/linux/minmax.h                        | 220 ++++++++++--------
 kernel/trace/preemptirq_delay_test.c          |   2 -
 lib/btree.c                                   |   1 -
 lib/decompress_unlzma.c                       |   2 +
 lib/vsprintf.c                                |   2 +-
 mm/zsmalloc.c                                 |   1 -
 net/ipv4/proc.c                               |   2 +-
 net/ipv6/proc.c                               |   2 +-
 tools/testing/selftests/seccomp/seccomp_bpf.c |   2 +
 tools/testing/selftests/vm/mremap_test.c      |   2 +
 36 files changed, 199 insertions(+), 142 deletions(-)

-- 
2.47.3