linux-kernelorg-stable/include/linux/array_size.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_ARRAY_SIZE_H
#define _LINUX_ARRAY_SIZE_H

#include <linux/compiler.h>

/**
 * ARRAY_SIZE - get the number of elements in array @arr
 * @arr: array to be sized
 */
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))

#endif  /* _LINUX_ARRAY_SIZE_H */
kernel.h: Move ARRAY_SIZE() to a separate header Touching files so used for the kernel, forces 'make' to recompile most of the kernel. Having those definitions in more granular files helps avoid recompiling so much of the kernel. Signed-off-by: Alejandro Colomar <alx@kernel.org> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230817143352.132583-2-lucas.segarra.fernandez@intel.com [andy: reduced to cover only string.h for now] Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 2023-10-03 11:59:53 +00:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`#ifndef _LINUX_ARRAY_SIZE_H`
			`#define _LINUX_ARRAY_SIZE_H`

			`#include <linux/compiler.h>`

			`/**`
			`* ARRAY_SIZE - get the number of elements in array @arr`
			`* @arr: array to be sized`
			`*/`
			`#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))`

			`#endif /* _LINUX_ARRAY_SIZE_H */`