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linux/kernel.h: Update upper_NN_bits() and lower_NN_bits() macros

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Synchronize upper_NN_bits() and lower_NN_bits() macros with Linux 6.16
commit 118d777c4cb4 ("wordpart.h: Add REPEAT_BYTE_U32()"). This fixes the
lower_32_bits() macros and assures it works with 64bit systems correctly.
This also adds 16bit variants of these macros, which will be used by the
Airoha PHY driver.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Marek Vasut
2025-09-22 14:29:22 +02:00
committed by Tom Rini
parent 8fd3768ca1
commit 70ae44f371
1 changed files with 13 additions and 1 deletions
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14
include/linux/kernel.h
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@@ -111,7 +111,19 @@
* lower_32_bits - return bits 0-31 of a number
* @n: the number we're accessing
*/
#define lower_32_bits(n) ((u32)(n))
#define lower_32_bits(n) ((u32)((n) & 0xffffffff))
/**
* upper_16_bits - return bits 16-31 of a number
* @n: the number we're accessing
*/
#define upper_16_bits(n) ((u16)((n) >> 16))
/**
* lower_16_bits - return bits 0-15 of a number
* @n: the number we're accessing
*/
#define lower_16_bits(n) ((u16)((n) & 0xffff))
/*
* abs() handles unsigned and signed longs, ints, shorts and chars. For all