From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Shevchenko Subject: [PATCH v1 1/3] bitmap: Add bitmap_alloc(), bitmap_zalloc() and bitmap_free() Date: Fri, 1 Jun 2018 11:31:18 +0300 Message-ID: <20180601083120.40352-1-andriy.shevchenko@linux.intel.com> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Dmitry Torokhov , Jeffy Chen , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Andy Shevchenko List-Id: linux-input@vger.kernel.org A lot of code become ugly because of open coding allocations for bitmaps. Introduce three helpers to allow users be more clear of intention and keep their code neat. Signed-off-by: Andy Shevchenko --- include/linux/bitmap.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 1ee46f492267..845822425393 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -6,6 +6,7 @@ #include #include +#include #include #include @@ -104,6 +105,21 @@ * contain all bit positions from 0 to 'bits' - 1. */ +static inline unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags) +{ + return kmalloc_array(BITS_TO_LONGS(nbits), sizeof(unsigned long), flags); +} + +static inline unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags) +{ + return kcalloc(BITS_TO_LONGS(nbits), sizeof(unsigned long), flags); +} + +static inline void bitmap_free(const unsigned long *bitmap) +{ + kfree(bitmap); +} + /* * lib/bitmap.c provides these functions: */ -- 2.17.0