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[v5,02/26] linux/bits.h: Extract common header for vDSO

Message ID 20200320145351.32292-3-vincenzo.frascino@arm.com (mailing list archive)
State Mainlined
Commit 3945ff37d2f48d39fd1751d282c80176654049e4
Headers show
Series Introduce common headers for vDSO | expand

Commit Message

Vincenzo Frascino March 20, 2020, 2:53 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/linux/bits.h | 2 +-
 include/vdso/bits.h  | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 include/vdso/bits.h
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Patch

diff --git a/include/linux/bits.h b/include/linux/bits.h
index 669d69441a62..a740bbcf3cd2 100644
--- a/include/linux/bits.h
+++ b/include/linux/bits.h
@@ -3,9 +3,9 @@ 
 #define __LINUX_BITS_H
 
 #include <linux/const.h>
+#include <vdso/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)
diff --git a/include/vdso/bits.h b/include/vdso/bits.h
new file mode 100644
index 000000000000..6d005a1f5d94
--- /dev/null
+++ b/include/vdso/bits.h
@@ -0,0 +1,9 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_BITS_H
+#define __VDSO_BITS_H
+
+#include <vdso/const.h>
+
+#define BIT(nr)			(UL(1) << (nr))
+
+#endif	/* __VDSO_BITS_H */