[PATCH v2 00/27 5.10.y] Backport minmax.h updates from v6.17-rc7

Eliav Farber
2025-10-17T09:05:50Z

This series backports 27 patches to update minmax.h in the 5.10.y
branch, aligning it with v6.17-rc7.

The ultimate goal is to synchronize all long-term branches so that they
include the full set of minmax.h changes.

- 6.12.y has already been backported; the changes are included in
v6.12.49.
- 6.6.y has already been backported; the changes are included in
v6.6.109.
- 6.1.y has already been backported; the changes are currently in the
6.1-stable tree.
- 5.15.y has already been backported; the changes are currently in the
5.15-stable tree.

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 kernel 5.10.y.

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.

The first two patches in this series were added to prevent build
failures caused by changes introduced later in minmax.h.

- Commit 92d23c6e9415 ("overflow, tracing: Define the is_signed_type()
macro once") is needed for commit 75ca38c1960f ("minmax: allow
min()/max()/clamp()").

- Commit cea628008fc8 ("btrfs: remove duplicated in_range() macro") is
needed for commit f9bff0e31881 ("minmax: add in_range() macro").

The changes were tested using `make allyesconfig` and
`make allmodconfig` for arm64, arm, x86_64 and i386 architectures.

Changes in v2:
The series was updated after initially backporting and approving the
newer long-term branches.

Andy Shevchenko (2):
minmax: deduplicate __unconst_integer_typeof()
minmax: fix header inclusions

Bart Van Assche (1):
overflow, tracing: Define the is_signed_type() macro once

David Laight (11):
minmax: allow min()/max()/clamp() if the arguments have the same
signedness.
minmax: fix indentation of __cmp_once() and __clamp_once()
minmax: allow comparisons of 'int' against 'unsigned char/short'
minmax: relax check to allow comparison between unsigned arguments and
signed constants
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

Herve Codina (1):
minmax: Introduce {min,max}_array()

Jason A. Donenfeld (2):
minmax: sanity check constant bounds when clamping
minmax: clamp more efficiently by avoiding extra comparison

Johannes Thumshirn (1):
btrfs: remove duplicated in_range() macro

Linus Torvalds (8):
minmax: avoid overly complicated constant expressions in VM code
minmax: add a few more MIN_T/MAX_T users
minmax: simplify and clarify min_t()/max_t() implementation
minmax: make generic MIN() and MAX() macros available everywhere
minmax: don't use max() in situations that want a C constant
expression
minmax: simplify min()/max()/clamp() implementation
minmax: improve macro expansion and type checking
minmax: fix up min3() and max3() too

Matthew Wilcox (Oracle) (1):
minmax: add in_range() macro

arch/arm/mm/pageattr.c | 6 +-
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 -
.../drm/amd/display/modules/hdcp/hdcp_ddc.c | 2 +
.../drm/amd/pm/powerplay/hwmgr/ppevvmath.h | 14 +-
.../drm/arm/display/include/malidp_utils.h | 2 +-
.../display/komeda/komeda_pipeline_state.c | 24 +-
drivers/gpu/drm/drm_color_mgmt.c | 2 +-
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 6 -
drivers/gpu/drm/radeon/evergreen_cs.c | 2 +
drivers/hwmon/adt7475.c | 24 +-
drivers/input/touchscreen/cyttsp4_core.c | 2 +-
drivers/md/dm-integrity.c | 6 +-
drivers/media/dvb-frontends/stv0367_priv.h | 3 +
.../net/ethernet/chelsio/cxgb3/cxgb3_main.c | 18 +-
.../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/ctree.h | 2 -
fs/btrfs/extent_io.c | 1 +
fs/btrfs/file-item.c | 1 +
fs/btrfs/misc.h | 2 -
fs/btrfs/raid56.c | 1 +
fs/btrfs/tree-checker.c | 2 +-
fs/erofs/zdata.h | 2 +-
fs/ext2/balloc.c | 2 -
fs/ext4/ext4.h | 2 -
fs/ufs/util.h | 6 -
include/linux/compiler.h | 15 +
include/linux/minmax.h | 267 ++++++++++++++----
include/linux/overflow.h | 1 -
include/linux/trace_events.h | 2 -
kernel/trace/preemptirq_delay_test.c | 2 -
lib/btree.c | 1 -
lib/decompress_unlzma.c | 2 +
lib/logic_pio.c | 3 -
lib/vsprintf.c | 2 +-
lib/zstd/zstd_internal.h | 2 -
mm/zsmalloc.c | 1 -
net/ipv4/proc.c | 2 +-
net/ipv6/proc.c | 2 +-
net/netfilter/nf_nat_core.c | 6 +-
net/tipc/core.h | 2 +-
net/tipc/link.c | 10 +-
49 files changed, 312 insertions(+), 169 deletions(-)

--
2.47.3