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Subject: Re: [PATCH 0/5] introduce
 setbits32/clrbits32/clrsetbits32/setbits64/clrbits64/clrsetbits64 functions
To:     Corentin Labbe <clabbe@baylibre.com>, Gilles.Muller@lip6.fr,
        Julia.Lawall@lip6.fr, agust@denx.de, alexandre.torgue@st.com,
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        davem@davemloft.net, galak@kernel.crashing.org,
        joabreu@synopsys.com, khilman@baylibre.com,
        maxime.ripard@bootlin.com, michal.lkml@markovi.net,
        mpe@ellerman.id.au, mporter@kernel.crashing.org,
        nicolas.palix@imag.fr, oss@buserror.net, paulus@samba.org,
        peppe.cavallaro@st.com, tj@kernel.org, vitb@kernel.crashing.org,
        wens@csie.org
Cc:     netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-ide@vger.kernel.org, linux-sunxi@googlegroups.com,
        linux-amlogic@lists.infradead.org, linuxppc-dev@lists.ozlabs.org,
        cocci@systeme.lip6.fr, linux-arm-kernel@lists.infradead.org
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From:   Christophe LEROY <christophe.leroy@c-s.fr>
Message-ID: <93f879d1-ddae-9a7c-e629-ee34f97686c6@c-s.fr>
Date:   Mon, 10 Sep 2018 07:24:16 +0200
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Le 07/09/2018 à 21:41, Corentin Labbe a écrit :
> Hello
> 
> This patchset adds a new set of functions which are open-coded in lot of
> place.
> Basicly the pattern is always the same, "read, modify a bit, write"
> some driver already have thoses pattern them as functions. (like ahci_sunxi.c or dwmac-meson8b)
> 
> The first patch rename some powerpc funtions which already use the same name (xxxbits32)
> but with only bigendian values.

The same name as what ?

> 
> The second patch adds the header.

But the second patch adds functions with the same name as the powerpc 
ones but doing something different. Why consider that setbits32() should 
be LE and not BE ?

Christophe


> The third patch is an ugly try to implement a coccinelle semantic patch to
> find all place where xxxbits function could be used.
> Probably this spatch could be better written and I didnt found an easy way to add the "linux/setbits" header.
> 
> The two last patch are example of convertion of two drivers.
> Thoses patchs give an example of the reduction of code won by using xxxbits32.
> 
> This patchset is tested with the ahci_sunxi and dwmac-sun8i drivers.
> 
> Regards
> 
> Corentin Labbe (5):
>    powerpc: rename setbits32/clrbits32 to setbits32_be/clrbits32_be
>    include: add
>      setbits32/clrbits32/clrsetbits32/setbits64/clrbits64/clrsetbits64 in
>      linux/setbits.h
>    coccinelle: add xxxsetbitsXX converting spatch
>    net: ethernet: stmmac: use xxxsetbits32
>    ata: ahci_sunxi: use xxxsetbits32 functions
> 
>   arch/powerpc/include/asm/fsl_lbc.h                 |   2 +-
>   arch/powerpc/include/asm/io.h                      |   5 +-
>   arch/powerpc/platforms/44x/canyonlands.c           |   4 +-
>   arch/powerpc/platforms/4xx/gpio.c                  |  28 +-
>   arch/powerpc/platforms/512x/pdm360ng.c             |   6 +-
>   arch/powerpc/platforms/52xx/mpc52xx_common.c       |   6 +-
>   arch/powerpc/platforms/52xx/mpc52xx_gpt.c          |  10 +-
>   arch/powerpc/platforms/82xx/ep8248e.c              |   2 +-
>   arch/powerpc/platforms/82xx/km82xx.c               |   6 +-
>   arch/powerpc/platforms/82xx/mpc8272_ads.c          |  10 +-
>   arch/powerpc/platforms/82xx/pq2.c                  |   2 +-
>   arch/powerpc/platforms/82xx/pq2ads-pci-pic.c       |   4 +-
>   arch/powerpc/platforms/82xx/pq2fads.c              |  10 +-
>   arch/powerpc/platforms/83xx/km83xx.c               |   6 +-
>   arch/powerpc/platforms/83xx/mpc836x_mds.c          |   2 +-
>   arch/powerpc/platforms/85xx/mpc85xx_mds.c          |   2 +-
>   arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c       |   4 +-
>   arch/powerpc/platforms/85xx/mpc85xx_rdb.c          |   2 +-
>   arch/powerpc/platforms/85xx/p1022_ds.c             |   4 +-
>   arch/powerpc/platforms/85xx/p1022_rdk.c            |   4 +-
>   arch/powerpc/platforms/85xx/t1042rdb_diu.c         |   4 +-
>   arch/powerpc/platforms/85xx/twr_p102x.c            |   2 +-
>   arch/powerpc/platforms/86xx/mpc8610_hpcd.c         |   4 +-
>   arch/powerpc/platforms/8xx/adder875.c              |   2 +-
>   arch/powerpc/platforms/8xx/m8xx_setup.c            |   4 +-
>   arch/powerpc/platforms/8xx/mpc86xads_setup.c       |   4 +-
>   arch/powerpc/platforms/8xx/mpc885ads_setup.c       |  28 +-
>   arch/powerpc/platforms/embedded6xx/flipper-pic.c   |   6 +-
>   arch/powerpc/platforms/embedded6xx/hlwd-pic.c      |   8 +-
>   arch/powerpc/platforms/embedded6xx/wii.c           |  10 +-
>   arch/powerpc/sysdev/cpm1.c                         |  26 +-
>   arch/powerpc/sysdev/cpm2.c                         |  16 +-
>   arch/powerpc/sysdev/cpm_common.c                   |   4 +-
>   arch/powerpc/sysdev/fsl_85xx_l2ctlr.c              |   8 +-
>   arch/powerpc/sysdev/fsl_lbc.c                      |   2 +-
>   arch/powerpc/sysdev/fsl_pci.c                      |   8 +-
>   arch/powerpc/sysdev/fsl_pmc.c                      |   2 +-
>   arch/powerpc/sysdev/fsl_rcpm.c                     |  74 ++--
>   arch/powerpc/sysdev/fsl_rio.c                      |   4 +-
>   arch/powerpc/sysdev/fsl_rmu.c                      |   8 +-
>   arch/powerpc/sysdev/mpic_timer.c                   |  12 +-
>   drivers/ata/ahci_sunxi.c                           |  51 +--
>   .../net/ethernet/stmicro/stmmac/dwmac-meson8b.c    |  54 +--
>   drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c  |  55 +--
>   .../net/ethernet/stmicro/stmmac/dwmac1000_core.c   |  21 +-
>   drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c  |  51 +--
>   drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c   |  13 +-
>   drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c   |  42 +-
>   drivers/net/ethernet/stmicro/stmmac/dwmac5.c       |  11 +-
>   drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c    |  17 +-
>   .../net/ethernet/stmicro/stmmac/dwxgmac2_core.c    |  30 +-
>   drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c |  69 +---
>   .../net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c  |  11 +-
>   drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c  |   7 +-
>   include/linux/setbits.h                            |  55 +++
>   scripts/coccinelle/misc/setbits.cocci              | 423 +++++++++++++++++++++
>   56 files changed, 776 insertions(+), 489 deletions(-)
>   create mode 100644 include/linux/setbits.h
>   create mode 100644 scripts/coccinelle/misc/setbits.cocci
>