linux-kernel - Re: [PATCH 1/5] drivers/powerpc: Replace _ALIGN

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Message-ID: <CACPK8XdzLiUkzp-B3DuwxVHgn-hZqKypoyU_PLtE5d0K=B1mXQ@mail.gmail.com>
Date:   Tue, 21 Apr 2020 00:49:23 +0000
From:   Joel Stanley <joel@....id.au>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        alsa-devel@...a-project.org, kvm@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 1/5] drivers/powerpc: Replace _ALIGN_UP() by ALIGN()

On Mon, 20 Apr 2020 at 18:37, Christophe Leroy <christophe.leroy@....fr> wrote:
>
> _ALIGN_UP() is specific to powerpc
> ALIGN() is generic and does the same
>
> Replace _ALIGN_UP() by ALIGN()
>
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>

I was curious, so I expanded out the kernel one. Here's the diff:

- (((addr)+((size)-1))&(~((typeof(addr))(size)-1)))
+ (((addr)+((typeof(addr))(size) - 1))&~((typeof(addr))(size)-1))

So it adds a cast, but aside from that it's the same.

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

> ---
>  drivers/ps3/ps3-lpm.c               | 6 +++---
>  drivers/vfio/pci/vfio_pci_nvlink2.c | 2 +-
>  drivers/video/fbdev/ps3fb.c         | 4 ++--
>  sound/ppc/snd_ps3.c                 | 2 +-
>  4 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/ps3/ps3-lpm.c b/drivers/ps3/ps3-lpm.c
> index 83c45659bc9d..064b5884ba13 100644
> --- a/drivers/ps3/ps3-lpm.c
> +++ b/drivers/ps3/ps3-lpm.c
> @@ -1096,8 +1096,8 @@ int ps3_lpm_open(enum ps3_lpm_tb_type tb_type, void *tb_cache,
>                 lpm_priv->tb_cache_internal = NULL;
>                 lpm_priv->tb_cache = NULL;
>         } else if (tb_cache) {
> -               if (tb_cache != (void *)_ALIGN_UP((unsigned long)tb_cache, 128)
> -                       || tb_cache_size != _ALIGN_UP(tb_cache_size, 128)) {
> +               if (tb_cache != (void *)ALIGN((unsigned long)tb_cache, 128)
> +                       || tb_cache_size != ALIGN(tb_cache_size, 128)) {
>                         dev_err(sbd_core(), "%s:%u: unaligned tb_cache\n",
>                                 __func__, __LINE__);
>                         result = -EINVAL;
> @@ -1116,7 +1116,7 @@ int ps3_lpm_open(enum ps3_lpm_tb_type tb_type, void *tb_cache,
>                         result = -ENOMEM;
>                         goto fail_malloc;
>                 }
> -               lpm_priv->tb_cache = (void *)_ALIGN_UP(
> +               lpm_priv->tb_cache = (void *)ALIGN(
>                         (unsigned long)lpm_priv->tb_cache_internal, 128);
>         }
>
> diff --git a/drivers/vfio/pci/vfio_pci_nvlink2.c b/drivers/vfio/pci/vfio_pci_nvlink2.c
> index ed20d73cc27c..65c61710c0e9 100644
> --- a/drivers/vfio/pci/vfio_pci_nvlink2.c
> +++ b/drivers/vfio/pci/vfio_pci_nvlink2.c
> @@ -67,7 +67,7 @@ static size_t vfio_pci_nvgpu_rw(struct vfio_pci_device *vdev,
>          *
>          * This is not fast path anyway.
>          */
> -       sizealigned = _ALIGN_UP(posoff + count, PAGE_SIZE);
> +       sizealigned = ALIGN(posoff + count, PAGE_SIZE);
>         ptr = ioremap_cache(data->gpu_hpa + posaligned, sizealigned);
>         if (!ptr)
>                 return -EFAULT;
> diff --git a/drivers/video/fbdev/ps3fb.c b/drivers/video/fbdev/ps3fb.c
> index 834f63edf700..9df78fb77267 100644
> --- a/drivers/video/fbdev/ps3fb.c
> +++ b/drivers/video/fbdev/ps3fb.c
> @@ -44,7 +44,7 @@
>  #define GPU_CMD_BUF_SIZE                       (2 * 1024 * 1024)
>  #define GPU_FB_START                           (64 * 1024)
>  #define GPU_IOIF                               (0x0d000000UL)
> -#define GPU_ALIGN_UP(x)                                _ALIGN_UP((x), 64)
> +#define GPU_ALIGN_UP(x)                                ALIGN((x), 64)
>  #define GPU_MAX_LINE_LENGTH                    (65536 - 64)
>
>  #define GPU_INTR_STATUS_VSYNC_0                        0       /* vsync on head A */
> @@ -1015,7 +1015,7 @@ static int ps3fb_probe(struct ps3_system_bus_device *dev)
>         }
>  #endif
>
> -       max_ps3fb_size = _ALIGN_UP(GPU_IOIF, 256*1024*1024) - GPU_IOIF;
> +       max_ps3fb_size = ALIGN(GPU_IOIF, 256*1024*1024) - GPU_IOIF;
>         if (ps3fb_videomemory.size > max_ps3fb_size) {
>                 dev_info(&dev->core, "Limiting ps3fb mem size to %lu bytes\n",
>                          max_ps3fb_size);
> diff --git a/sound/ppc/snd_ps3.c b/sound/ppc/snd_ps3.c
> index 6d2a33b8faa0..b8161a08f2ca 100644
> --- a/sound/ppc/snd_ps3.c
> +++ b/sound/ppc/snd_ps3.c
> @@ -926,7 +926,7 @@ static int snd_ps3_driver_probe(struct ps3_system_bus_device *dev)
>                             PAGE_SHIFT, /* use system page size */
>                             0, /* dma type; not used */
>                             NULL,
> -                           _ALIGN_UP(SND_PS3_DMA_REGION_SIZE, PAGE_SIZE));
> +                           ALIGN(SND_PS3_DMA_REGION_SIZE, PAGE_SIZE));
>         dev->d_region->ioid = PS3_AUDIO_IOID;
>
>         ret = ps3_dma_region_create(dev->d_region);
> --
> 2.25.0
>