From: Jinjie Ruan Date: Tue, 3 Sep 2024 11:53:58 +0800 Subject: [PATCH 36/54] printk: Use the BITS_PER_LONG macro Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.11/older/patches-6.11-rt7.tar.xz sizeof(unsigned long) * 8 is the number of bits in an unsigned long variable, replace it with BITS_PER_LONG macro to make it simpler. Signed-off-by: Jinjie Ruan Reviewed-by: John Ogness Reviewed-by: Petr Mladek Link: https://lore.kernel.org/r/20240903035358.308482-1-ruanjinjie@huawei.com Signed-off-by: Petr Mladek Signed-off-by: Sebastian Andrzej Siewior --- kernel/printk/printk_ringbuffer.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/kernel/printk/printk_ringbuffer.h +++ b/kernel/printk/printk_ringbuffer.h @@ -4,6 +4,7 @@ #define _KERNEL_PRINTK_RINGBUFFER_H #include +#include #include #include #include @@ -122,7 +123,7 @@ enum desc_state { #define _DATA_SIZE(sz_bits) (1UL << (sz_bits)) #define _DESCS_COUNT(ct_bits) (1U << (ct_bits)) -#define DESC_SV_BITS (sizeof(unsigned long) * 8) +#define DESC_SV_BITS BITS_PER_LONG #define DESC_FLAGS_SHIFT (DESC_SV_BITS - 2) #define DESC_FLAGS_MASK (3UL << DESC_FLAGS_SHIFT) #define DESC_STATE(sv) (3UL & (sv >> DESC_FLAGS_SHIFT))