linux/arch
Linus Torvalds 4477b39c32 minmax: add a few more MIN_T/MAX_T users
Commit 3a7e02c040 ("minmax: avoid overly complicated constant
expressions in VM code") added the simpler MIN_T/MAX_T macros in order
to avoid some excessive expansion from the rather complicated regular
min/max macros.

The complexity of those macros stems from two issues:

 (a) trying to use them in situations that require a C constant
     expression (in static initializers and for array sizes)

 (b) the type sanity checking

and MIN_T/MAX_T avoids both of these issues.

Now, in the whole (long) discussion about all this, it was pointed out
that the whole type sanity checking is entirely unnecessary for
min_t/max_t which get a fixed type that the comparison is done in.

But that still leaves min_t/max_t unnecessarily complicated due to
worries about the C constant expression case.

However, it turns out that there really aren't very many cases that use
min_t/max_t for this, and we can just force-convert those.

This does exactly that.

Which in turn will then allow for much simpler implementations of
min_t()/max_t().  All the usual "macros in all upper case will evaluate
the arguments multiple times" rules apply.

We should do all the same things for the regular min/max() vs MIN/MAX()
cases, but that has the added complexity of various drivers defining
their own local versions of MIN/MAX, so that needs another level of
fixes first.

Link: https://lore.kernel.org/all/b47fad1d0cf8449886ad148f8c013dae@AcuMS.aculab.com/
Cc: David Laight <David.Laight@aculab.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2024-07-28 13:41:14 -07:00
..
alpha
arc arc: convert to generic syscall table 2024-07-10 14:23:38 +02:00
arm Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
arm64 RISC-V Patches for the 6.11 Merge Window, Part 2 2024-07-27 10:14:34 -07:00
csky ftrace: Rewrite of function graph tracer 2024-07-18 13:36:33 -07:00
hexagon hexagon: use new system call table 2024-07-10 14:23:38 +02:00
loongarch RISC-V Patches for the 6.11 Merge Window, Part 2 2024-07-27 10:14:34 -07:00
m68k Kbuild updates for v6.11 2024-07-23 14:32:21 -07:00
microblaze syscalls: mmap(): use unsigned offset type consistently 2024-06-25 15:57:38 +02:00
mips - Use improved timer sync for Loongson64 2024-07-25 12:41:53 -07:00
nios2 Kbuild updates for v6.11 2024-07-23 14:32:21 -07:00
openrisc openrisc: convert to generic syscall table 2024-07-10 14:23:38 +02:00
parisc parisc architecture fixes and updates for kernel v6.11-rc1: 2024-07-25 12:37:42 -07:00
powerpc Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
riscv RISC-V Patches for the 6.11 Merge Window, Part 2 2024-07-27 10:14:34 -07:00
s390 more s390 updates for 6.11 merge window 2024-07-26 10:47:53 -07:00
sh sh updates for v6.11 2024-07-23 11:57:52 -07:00
sparc Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
um This pull request contains the following changes for UML: 2024-07-25 12:33:08 -07:00
x86 minmax: add a few more MIN_T/MAX_T users 2024-07-28 13:41:14 -07:00
xtensa - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
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