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Commit a1c4d24e authored by Randy Dunlap's avatar Randy Dunlap Committed by Jonathan Corbet
Browse files

linux/log2.h: fix kernel-doc notation 



Fix <linux/log2.h> kernel-doc:
- Add kernel-doc notation to some functions.
- Fix kernel-doc notation in function parameters.

Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 13277782

include/linux/log2.h

+23 −19
Original line number Diff line number Diff line
@@ -37,19 +37,23 @@ int __ilog2_u64(u64 n) 
}

#endif



/*

/**

 * is_power_of_2() - check if a value is a power of two

 * @n: the value to check

 *

 * Determine whether some value is a power of two, where zero is

 * *not* considered a power of two.

 * Return: true if @n is a power of 2, otherwise false.

 */



static inline __attribute__((const))

bool is_power_of_2(unsigned long n)

{

	return (n != 0 && ((n & (n - 1)) == 0));

}



/*

 * round up to nearest power of two

/**

 * __roundup_pow_of_two() - round up to nearest power of two

 * @n: value to round up

 */

static inline __attribute__((const))

unsigned long __roundup_pow_of_two(unsigned long n)
@@ -57,8 +61,9 @@ unsigned long __roundup_pow_of_two(unsigned long n) 
	return 1UL << fls_long(n - 1);

}



/*

 * round down to nearest power of two

/**

 * __rounddown_pow_of_two() - round down to nearest power of two

 * @n: value to round down

 */

static inline __attribute__((const))

unsigned long __rounddown_pow_of_two(unsigned long n)
@@ -67,8 +72,8 @@ unsigned long __rounddown_pow_of_two(unsigned long n) 
}



/**

 * ilog2 - log of base 2 of 32-bit or a 64-bit unsigned value

 * @n - parameter

 * ilog2 - log base 2 of 32-bit or a 64-bit unsigned value

 * @n: parameter

 *

 * constant-capable log of base 2 calculation

 * - this can be used to initialise global variables from constant data, hence
@@ -150,7 +155,7 @@ unsigned long __rounddown_pow_of_two(unsigned long n) 


/**

 * roundup_pow_of_two - round the given value up to nearest power of two

 * @n - parameter

 * @n: parameter

 *

 * round the given value up to the nearest power of two

 * - the result is undefined when n == 0
@@ -167,7 +172,7 @@ unsigned long __rounddown_pow_of_two(unsigned long n) 


/**

 * rounddown_pow_of_two - round the given value down to nearest power of two

 * @n - parameter

 * @n: parameter

 *

 * round the given value down to the nearest power of two

 * - the result is undefined when n == 0
@@ -180,6 +185,12 @@ unsigned long __rounddown_pow_of_two(unsigned long n) 
	__rounddown_pow_of_two(n)		\

 )



static inline __attribute_const__

int __order_base_2(unsigned long n)

{

	return n > 1 ? ilog2(n - 1) + 1 : 0;

}



/**

 * order_base_2 - calculate the (rounded up) base 2 order of the argument

 * @n: parameter
@@ -193,13 +204,6 @@ unsigned long __rounddown_pow_of_two(unsigned long n) 
 *  ob2(5) = 3

 *  ... and so on.

 */



static inline __attribute_const__

int __order_base_2(unsigned long n)

{

	return n > 1 ? ilog2(n - 1) + 1 : 0;

}



#define order_base_2(n)				\

(						\

	__builtin_constant_p(n) ? (		\