lib: bitmap: fix many kernel-doc warnings

Fix kernel-doc warings in lib/bitmap.c:

  lib/bitmap.c:498: warning: Function parameter or member 'buf' not described in 'bitmap_print_to_buf'
  lib/bitmap.c:498: warning: Function parameter or member 'maskp' not described in 'bitmap_print_to_buf'
  lib/bitmap.c:498: warning: Function parameter or member 'nmaskbits' not described in 'bitmap_print_to_buf'
  lib/bitmap.c:498: warning: Function parameter or member 'off' not described in 'bitmap_print_to_buf'
  lib/bitmap.c:498: warning: Function parameter or member 'count' not described in 'bitmap_print_to_buf'
  lib/bitmap.c:561: warning: contents before sections
  lib/bitmap.c:606: warning: Function parameter or member 'buf' not described in 'bitmap_print_list_to_buf'
  lib/bitmap.c:606: warning: Function parameter or member 'maskp' not described in 'bitmap_print_list_to_buf'
  lib/bitmap.c:606: warning: Function parameter or member 'nmaskbits' not described in 'bitmap_print_list_to_buf'
  lib/bitmap.c:606: warning: Function parameter or member 'off' not described in 'bitmap_print_list_to_buf'
  lib/bitmap.c:606: warning: Function parameter or member 'count' not described in 'bitmap_print_list_to_buf'
  lib/bitmap.c:819: warning: missing initial short description on line:
   * bitmap_parselist_user()

This still leaves 15 warnings for function return values not described,
similar to this one:

  bitmap.c:890: warning: No description found for return value of 'bitmap_parse'

Link: https://lkml.kernel.org/r/20220306065823.5153-1-rdunlap@infradead.org
Fixes: 1fae5629 ("cpumask: introduce cpumap_print_list/bitmask_to_buf to support large bitmask and list")
Fixes: 4b060420 ("bitmap, irq: add smp_affinity_list interface to /proc/irq")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Tian Tao <tiantao6@hisilicon.com>
Cc: Mike Travis <mike.travis@hpe.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/bitmap.c

@@ -492,6 +492,11 @@ EXPORT_SYMBOL(bitmap_print_to_pagebuf);
  * @list: indicates whether the bitmap must be list
  *      true:  print in decimal list format
  *      false: print in hexadecimal bitmask format
+ * @buf: buffer into which string is placed
+ * @maskp: pointer to bitmap to convert
+ * @nmaskbits: size of bitmap, in bits
+ * @off: in the string from which we are copying, We copy to @buf
+ * @count: the maximum number of bytes to print
  */
 static int bitmap_print_to_buf(bool list, char *buf, const unsigned long *maskp,
 		int nmaskbits, loff_t off, size_t count)
@@ -512,6 +517,11 @@ static int bitmap_print_to_buf(bool list, char *buf, const unsigned long *maskp,
 
 /**
  * bitmap_print_bitmask_to_buf  - convert bitmap to hex bitmask format ASCII string
+ * @buf: buffer into which string is placed
+ * @maskp: pointer to bitmap to convert
+ * @nmaskbits: size of bitmap, in bits
+ * @off: in the string from which we are copying, We copy to @buf
+ * @count: the maximum number of bytes to print
  *
  * The bitmap_print_to_pagebuf() is used indirectly via its cpumap wrapper
  * cpumap_print_to_pagebuf() or directly by drivers to export hexadecimal
@@ -553,12 +563,6 @@ static int bitmap_print_to_buf(bool list, char *buf, const unsigned long *maskp,
  * move to use bin_attribute. In result, we have to pass the corresponding
  * parameters such as off, count from bin_attribute show entry to this API.
  *
- * @buf: buffer into which string is placed
- * @maskp: pointer to bitmap to convert
- * @nmaskbits: size of bitmap, in bits
- * @off: in the string from which we are copying, We copy to @buf
- * @count: the maximum number of bytes to print
- *
  * The role of cpumap_print_bitmask_to_buf() and cpumap_print_list_to_buf()
  * is similar with cpumap_print_to_pagebuf(),  the difference is that
  * bitmap_print_to_pagebuf() mainly serves sysfs attribute with the assumption
@@ -597,6 +601,11 @@ EXPORT_SYMBOL(bitmap_print_bitmask_to_buf);
 
 /**
  * bitmap_print_list_to_buf  - convert bitmap to decimal list format ASCII string
+ * @buf: buffer into which string is placed
+ * @maskp: pointer to bitmap to convert
+ * @nmaskbits: size of bitmap, in bits
+ * @off: in the string from which we are copying, We copy to @buf
+ * @count: the maximum number of bytes to print
  *
  * Everything is same with the above bitmap_print_bitmask_to_buf() except
  * the print format.
@@ -807,7 +816,8 @@ EXPORT_SYMBOL(bitmap_parselist);
 
 
 /**
- * bitmap_parselist_user()
+ * bitmap_parselist_user() - convert user buffer's list format ASCII
+ * string to bitmap
  *
  * @ubuf: pointer to user buffer containing string.
  * @ulen: buffer size in bytes.  If string is smaller than this