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    Subject[PATCH v11 1/5] powerpc/processor: Move cpu_relax() into asm/vdso/processor.h
    Date
    cpu_relax() need to be in asm/vdso/processor.h to be used by
    the C VDSO generic library.

    Move it there.

    Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
    ---
    v9: Forgot to remove cpu_relax() from processor.h in v8
    ---
    arch/powerpc/include/asm/processor.h | 13 ++-----------
    arch/powerpc/include/asm/vdso/processor.h | 23 +++++++++++++++++++++++
    2 files changed, 25 insertions(+), 11 deletions(-)
    create mode 100644 arch/powerpc/include/asm/vdso/processor.h

    diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
    index ed0d633ab5aa..c1ba9c8d9b90 100644
    --- a/arch/powerpc/include/asm/processor.h
    +++ b/arch/powerpc/include/asm/processor.h
    @@ -6,6 +6,8 @@
    * Copyright (C) 2001 PPC 64 Team, IBM Corp
    */

    +#include <vdso/processor.h>
    +
    #include <asm/reg.h>

    #ifdef CONFIG_VSX
    @@ -63,14 +65,6 @@ extern int _chrp_type;

    #endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */

    -/* Macros for adjusting thread priority (hardware multi-threading) */
    -#define HMT_very_low() asm volatile("or 31,31,31 # very low priority")
    -#define HMT_low() asm volatile("or 1,1,1 # low priority")
    -#define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority")
    -#define HMT_medium() asm volatile("or 2,2,2 # medium priority")
    -#define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority")
    -#define HMT_high() asm volatile("or 3,3,3 # high priority")
    -
    #ifdef __KERNEL__

    #ifdef CONFIG_PPC64
    @@ -350,7 +344,6 @@ static inline unsigned long __pack_fe01(unsigned int fpmode)
    }

    #ifdef CONFIG_PPC64
    -#define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0)

    #define spin_begin() HMT_low()

    @@ -369,8 +362,6 @@ do { \
    } \
    } while (0)

    -#else
    -#define cpu_relax() barrier()
    #endif

    /* Check that a certain kernel stack pointer is valid in task_struct p */
    diff --git a/arch/powerpc/include/asm/vdso/processor.h b/arch/powerpc/include/asm/vdso/processor.h
    new file mode 100644
    index 000000000000..39b9beace9ca
    --- /dev/null
    +++ b/arch/powerpc/include/asm/vdso/processor.h
    @@ -0,0 +1,23 @@
    +/* SPDX-License-Identifier: GPL-2.0-only */
    +#ifndef __ASM_VDSO_PROCESSOR_H
    +#define __ASM_VDSO_PROCESSOR_H
    +
    +#ifndef __ASSEMBLY__
    +
    +/* Macros for adjusting thread priority (hardware multi-threading) */
    +#define HMT_very_low() asm volatile("or 31, 31, 31 # very low priority")
    +#define HMT_low() asm volatile("or 1, 1, 1 # low priority")
    +#define HMT_medium_low() asm volatile("or 6, 6, 6 # medium low priority")
    +#define HMT_medium() asm volatile("or 2, 2, 2 # medium priority")
    +#define HMT_medium_high() asm volatile("or 5, 5, 5 # medium high priority")
    +#define HMT_high() asm volatile("or 3, 3, 3 # high priority")
    +
    +#ifdef CONFIG_PPC64
    +#define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0)
    +#else
    +#define cpu_relax() barrier()
    +#endif
    +
    +#endif /* __ASSEMBLY__ */
    +
    +#endif /* __ASM_VDSO_PROCESSOR_H */
    --
    2.25.0
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