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Message-Id: <20171013215645.23166-2-andi@firstfloor.org>
Date: Fri, 13 Oct 2017 14:56:41 -0700
From: Andi Kleen <andi@...stfloor.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH v10 1/5] bitops: Add clear/set_bit32 to linux/bitops.h
From: Andi Kleen <ak@...ux.intel.com>
Add two simple wrappers around set_bit/clear_bit that accept
the common case of an u32 array. This avoids writing
casts in all callers.
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
include/linux/bitops.h | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 8fbe259b197c..36794f058ba6 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -227,6 +227,32 @@ static inline unsigned long __ffs64(u64 word)
return __ffs((unsigned long)word);
}
+/*
+ * clear_bit32 - Clear a bit in memory for u32 array
+ * @nr: Bit to clear
+ * @addr: u32 * address of bitmap
+ *
+ * Same as clear_bit, but avoids needing casts for u32 arrays.
+ */
+
+static __always_inline void clear_bit32(long nr, volatile u32 *addr)
+{
+ clear_bit(nr, (volatile unsigned long *)addr);
+}
+
+/*
+ * set_bit32 - Set a bit in memory for u32 array
+ * @nr: Bit to clear
+ * @addr: u32 * address of bitmap
+ *
+ * Same as set_bit, but avoids needing casts for u32 arrays.
+ */
+
+static __always_inline void set_bit32(long nr, volatile u32 *addr)
+{
+ set_bit(nr, (volatile unsigned long *)addr);
+}
+
#ifdef __KERNEL__
#ifndef set_mask_bits
--
2.13.6
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