printk: Use the BITS_PER_LONG macro

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 <ruanjinjie@huawei.com>
Reviewed-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240903035358.308482-1-ruanjinjie@huawei.com
Signed-off-by: Petr Mladek <pmladek@suse.com>

diff --git a/kernel/printk/printk_ringbuffer.h b/kernel/printk/printk_ringbuffer.h
index bd2a892deac1a978932333d8e2f8602fbca9b5a6..8de6c495cf2b7ffaf9250d479576deedcaf976fe 100644 (file)
--- a/kernel/printk/printk_ringbuffer.h
+++ b/kernel/printk/printk_ringbuffer.h
@@ -4,6 +4,7 @@
 #define _KERNEL_PRINTK_RINGBUFFER_H
 
 #include <linux/atomic.h>
+#include <linux/bits.h>
 #include <linux/dev_printk.h>
 #include <linux/stddef.h>
 #include <linux/types.h>
@@ -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))