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From:   Joel Stanley <joel@jms.id.au>
Date:   Tue, 21 Apr 2020 01:11:51 +0000
Message-ID: <CACPK8XfCS0X_YsuL8Bq-a3gNgEBoTb8=cK6yBvK4qVwvATZ68A@mail.gmail.com>
Subject: Re: [PATCH 4/5] powerpc: Replace _ALIGN() by ALIGN()
To:     Christophe Leroy <christophe.leroy@c-s.fr>
Cc:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
        dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
        alsa-devel@alsa-project.org
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On Mon, 20 Apr 2020 at 18:39, Christophe Leroy <christophe.leroy@c-s.fr> wrote:
>
> _ALIGN() is specific to powerpc
> ALIGN() is generic and does the same
>
> Replace _ALIGN() by ALIGN()
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Reviewed-by: Joel Stanley <joel@jms.id.au>

> ---
>  arch/powerpc/include/asm/book3s/32/pgtable.h | 2 +-
>  arch/powerpc/include/asm/nohash/32/pgtable.h | 2 +-
>  arch/powerpc/kernel/prom_init.c              | 8 ++++----
>  arch/powerpc/platforms/powermac/bootx_init.c | 4 ++--
>  4 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
> index 53b5c93eaf5d..0d4bccb4b9f2 100644
> --- a/arch/powerpc/include/asm/book3s/32/pgtable.h
> +++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
> @@ -188,7 +188,7 @@ int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
>   * memory shall not share segments.
>   */
>  #if defined(CONFIG_STRICT_KERNEL_RWX) && defined(CONFIG_MODULES)
> -#define VMALLOC_START ((_ALIGN((long)high_memory, 256L << 20) + VMALLOC_OFFSET) & \
> +#define VMALLOC_START ((ALIGN((long)high_memory, 256L << 20) + VMALLOC_OFFSET) & \
>                        ~(VMALLOC_OFFSET - 1))
>  #else
>  #define VMALLOC_START ((((long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))
> diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
> index 5b4d4c4297e1..4315d40906a0 100644
> --- a/arch/powerpc/include/asm/nohash/32/pgtable.h
> +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
> @@ -110,7 +110,7 @@ int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
>   */
>  #define VMALLOC_OFFSET (0x1000000) /* 16M */
>  #ifdef PPC_PIN_SIZE
> -#define VMALLOC_START (((_ALIGN((long)high_memory, PPC_PIN_SIZE) + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))
> +#define VMALLOC_START (((ALIGN((long)high_memory, PPC_PIN_SIZE) + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))

Perhaps this once needed to be more flexiable, but now it always
aligns to 256M and then to 16MB.

>  #else
>  #define VMALLOC_START ((((long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))

This is an open coded align to VMALLOC_OFFSET.

>  #endif
> diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
> index 3a5a7db4564f..e3a9fde51c4f 100644
> --- a/arch/powerpc/kernel/prom_init.c
> +++ b/arch/powerpc/kernel/prom_init.c
> @@ -2426,7 +2426,7 @@ static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
>  {
>         void *ret;
>
> -       *mem_start = _ALIGN(*mem_start, align);
> +       *mem_start = ALIGN(*mem_start, align);
>         while ((*mem_start + needed) > *mem_end) {
>                 unsigned long room, chunk;
>
> @@ -2562,7 +2562,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
>                                 *lp++ = *p;
>                 }
>                 *lp = 0;
> -               *mem_start = _ALIGN((unsigned long)lp + 1, 4);
> +               *mem_start = ALIGN((unsigned long)lp + 1, 4);
>         }
>
>         /* get it again for debugging */
> @@ -2608,7 +2608,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
>                 /* push property content */
>                 valp = make_room(mem_start, mem_end, l, 4);
>                 call_prom("getprop", 4, 1, node, pname, valp, l);
> -               *mem_start = _ALIGN(*mem_start, 4);
> +               *mem_start = ALIGN(*mem_start, 4);
>
>                 if (!prom_strcmp(pname, "phandle"))
>                         has_phandle = 1;
> @@ -2667,7 +2667,7 @@ static void __init flatten_device_tree(void)
>                 prom_panic ("couldn't get device tree root\n");
>
>         /* Build header and make room for mem rsv map */
> -       mem_start = _ALIGN(mem_start, 4);
> +       mem_start = ALIGN(mem_start, 4);
>         hdr = make_room(&mem_start, &mem_end,
>                         sizeof(struct boot_param_header), 4);
>         dt_header_start = (unsigned long)hdr;
> diff --git a/arch/powerpc/platforms/powermac/bootx_init.c b/arch/powerpc/platforms/powermac/bootx_init.c
> index c3374a90952f..9d4ecd292255 100644
> --- a/arch/powerpc/platforms/powermac/bootx_init.c
> +++ b/arch/powerpc/platforms/powermac/bootx_init.c
> @@ -386,7 +386,7 @@ static unsigned long __init bootx_flatten_dt(unsigned long start)
>         hdr->dt_strings_size = bootx_dt_strend - bootx_dt_strbase;
>
>         /* Build structure */
> -       mem_end = _ALIGN(mem_end, 16);
> +       mem_end = ALIGN(mem_end, 16);
>         DBG("Building device tree structure at: %x\n", mem_end);
>         hdr->off_dt_struct = mem_end - mem_start;
>         bootx_scan_dt_build_struct(base, 4, &mem_end);
> @@ -404,7 +404,7 @@ static unsigned long __init bootx_flatten_dt(unsigned long start)
>          * also bump mem_reserve_cnt to cause further reservations to
>          * fail since it's too late.
>          */
> -       mem_end = _ALIGN(mem_end, PAGE_SIZE);
> +       mem_end = ALIGN(mem_end, PAGE_SIZE);
>         DBG("End of boot params: %x\n", mem_end);
>         rsvmap[0] = mem_start;
>         rsvmap[1] = mem_end;
> --
> 2.25.0
>