[02/19] linux/bits.h: Extract common header for vDSO
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Message ID 20200213161614.23246-3-vincenzo.frascino@arm.com
State New
Headers show
Series
  • Introduce common headers
Related show

Commit Message

Vincenzo Frascino Feb. 13, 2020, 4:15 p.m. UTC
The vDSO library should only include the necessary headers required for
a userspace library (UAPI and a minimal set of kernel headers). To make
this possible it is necessary to isolate from the kernel headers the
common parts that are strictly necessary to build the library.

Split bits.h into linux and common headers to make the latter suitable
for inclusion in the vDSO library.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 include/common/bits.h | 9 +++++++++
 include/linux/bits.h  | 2 +-
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 include/common/bits.h

Patch
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diff --git a/include/common/bits.h b/include/common/bits.h
new file mode 100644
index 000000000000..6da493992e52
--- /dev/null
+++ b/include/common/bits.h
@@ -0,0 +1,9 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __COMMON_BITS_H
+#define __COMMON_BITS_H
+
+#include <common/const.h>
+
+#define BIT(nr)			(UL(1) << (nr))
+
+#endif	/* __COMMON_BITS_H */
diff --git a/include/linux/bits.h b/include/linux/bits.h
index 669d69441a62..aeb76fede77a 100644
--- a/include/linux/bits.h
+++ b/include/linux/bits.h
@@ -3,9 +3,9 @@ 
 #define __LINUX_BITS_H
 
 #include <linux/const.h>
+#include <common/bits.h>
 #include <asm/bitsperlong.h>
 
-#define BIT(nr)			(UL(1) << (nr))
 #define BIT_ULL(nr)		(ULL(1) << (nr))
 #define BIT_MASK(nr)		(UL(1) << ((nr) % BITS_PER_LONG))
 #define BIT_WORD(nr)		((nr) / BITS_PER_LONG)