kernel/platform-feature.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <linux/bitops.h>
   4 #include <linux/cache.h>
   5 #include <linux/export.h>
   6 #include <linux/platform-feature.h>
   7
   8 #define PLATFORM_FEAT_ARRAY_SZ  BITS_TO_LONGS(PLATFORM_FEAT_N)
   9 static unsigned long __read_mostly platform_features[PLATFORM_FEAT_ARRAY_SZ];
  10
  11 void platform_set(unsigned int feature)
  12 {
  13         set_bit(feature, platform_features);
  14 }
  15 EXPORT_SYMBOL_GPL(platform_set);
  16
  17 void platform_clear(unsigned int feature)
  18 {
  19         clear_bit(feature, platform_features);
  20 }
  21 EXPORT_SYMBOL_GPL(platform_clear);
  22
  23 bool platform_has(unsigned int feature)
  24 {
  25         return test_bit(feature, platform_features);
  26 }
  27 EXPORT_SYMBOL_GPL(platform_has);