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

    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 */
    --
    2.25.1
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