From: Denis Orlov <denorl2009@gmail.com>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>,
Denis Orlov <denorl2009@gmail.com>
Subject: [PATCH 3/3] include: bitops: import more BITS_TO_* defines from linux
Date: Fri, 9 Jun 2023 07:54:09 +0300 [thread overview]
Message-ID: <20230609045829.2225-4-denorl2009@gmail.com> (raw)
In-Reply-To: <20230609045829.2225-1-denorl2009@gmail.com>
Those seem quite useful, e.g. when defining bitmasks.
Signed-off-by: Denis Orlov <denorl2009@gmail.com>
---
include/linux/bitops.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index d9a5a81a9c..a5f6ac6545 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -14,7 +14,11 @@
#define BIT_ULL_MASK(nr) (ULL(1) << ((nr) % BITS_PER_LONG_LONG))
#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG)
#define BITS_PER_BYTE 8
-#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
+#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
+#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
+#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))
+#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32))
+#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char))
#endif
/*
--
2.41.0
next prev parent reply other threads:[~2023-06-09 5:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-09 4:54 [PATCH 0/3] include: bitops/const: partial update from Linux Denis Orlov
2023-06-09 4:54 ` [PATCH 1/3] include: const: make UL/ULL() macros commonly available Denis Orlov
2023-06-09 4:54 ` [PATCH 2/3] include: bitops: allow BIT* macros to be used in assembly code Denis Orlov
2023-06-09 4:54 ` Denis Orlov [this message]
2023-06-09 6:30 ` [PATCH 0/3] include: bitops/const: partial update from Linux Sascha Hauer
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