usb: composite: Move bitmap related operations to ./include/linux/bitmap.h
The BITMAP related operations can now be moved to ./include/linux/bitmap.h
file to mimic the Linux kernel directory tree.
This change also allows to remove the lin_gadget_compat.h header file
(which is a legacy code only for composite U-boot layer).
It was also possible to remove #includes from several USB gadget drivers.
Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Stefan Agner <stefan.agner@toradex.com>
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
new file mode 100644
index 0000000..4a54ae0
--- /dev/null
+++ b/include/linux/bitmap.h
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0+
+#ifndef __LINUX_BITMAP_H
+#define __LINUX_BITMAP_H
+
+#include <asm/types.h>
+#include <linux/types.h>
+#include <linux/bitops.h>
+
+#define small_const_nbits(nbits) \
+ (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
+
+static inline void bitmap_zero(unsigned long *dst, int nbits)
+{
+ if (small_const_nbits(nbits)) {
+ *dst = 0UL;
+ } else {
+ int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
+
+ memset(dst, 0, len);
+ }
+}
+
+#endif /* __LINUX_BITMAP_H */