lib: Import few bitmap functions from Linux
Import few basic bitmap functions (bitmap_{weight,fill,set,clear,or}())
and their dependencies from Linux. These are required for upcoming DMA
resource allocation support for TI's K3 SoCs.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 259df43..a07c70f 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -4,6 +4,7 @@
#include <asm/types.h>
#include <asm-generic/bitsperlong.h>
#include <linux/compiler.h>
+#include <linux/kernel.h>
#ifdef __KERNEL__
#define BIT(nr) (1UL << (nr))
@@ -133,6 +134,17 @@
return (res & 0x0F) + ((res >> 4) & 0x0F);
}
+static inline unsigned long generic_hweight64(__u64 w)
+{
+ return generic_hweight32((unsigned int)(w >> 32)) +
+ generic_hweight32((unsigned int)w);
+}
+
+static inline unsigned long hweight_long(unsigned long w)
+{
+ return sizeof(w) == 4 ? generic_hweight32(w) : generic_hweight64(w);
+}
+
#include <asm/bitops.h>
/* linux/include/asm-generic/bitops/non-atomic.h */