From: Caleb Connolly <caleb.connolly@linaro.org>
Date: Mon, 15 Jul 2024 10:08:01 +0000 (+0200)
Subject: linux/bitmap.h: add bitmap_empty helper
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=555047df6a79bae4748a72ff8c2e42e242a2a361;p=u-boot.git

linux/bitmap.h: add bitmap_empty helper

Import this function from Linux as of 6.10-rc6

Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
---

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 0a8503af9f..40ca2212cb 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -196,6 +196,14 @@ static inline void bitmap_fill(unsigned long *dst, unsigned int nbits)
 	}
 }
 
+static inline bool bitmap_empty(const unsigned long *src, unsigned int nbits)
+{
+	if (small_const_nbits(nbits))
+		return !(*src & BITMAP_LAST_WORD_MASK(nbits));
+
+	return find_first_bit(src, nbits) == nbits;
+}
+
 static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
 			     const unsigned long *src2, unsigned int nbits)
 {