[-next PATCH 0/4] sysfs and DEVICE_ATTR_<foo>

[-next PATCH 0/4] sysfs and DEVICE_ATTR_<foo>

[Joe Perches]

Joe Perches (4):
  sysfs.h: Use octal permissions
  treewide: Use DEVICE_ATTR_RW
  treewide: Use DEVICE_ATTR_RO
  treewide: Use DEVICE_ATTR_WO

 arch/arm/mach-pxa/sharpsl_pm.c                     |  4 +-
 arch/s390/kernel/smp.c                             |  2 +-
 arch/s390/kernel/topology.c                        |  3 +-
 arch/sh/drivers/push-switch.c                      |  2 +-
 arch/tile/kernel/sysfs.c                           | 12 ++--
 arch/x86/kernel/cpu/microcode/core.c               |  2 +-
 drivers/acpi/device_sysfs.c                        |  6 +-
 drivers/char/ipmi/ipmi_msghandler.c                | 17 +++---
 drivers/gpu/drm/i915/i915_sysfs.c                  | 12 ++--
 drivers/input/touchscreen/elants_i2c.c             |  2 +-
 drivers/net/ethernet/ibm/ibmvnic.c                 |  2 +-
 drivers/net/wimax/i2400m/sysfs.c                   |  3 +-
 drivers/nvme/host/core.c                           | 10 ++--
 drivers/platform/x86/compal-laptop.c               | 18 ++----
 drivers/s390/cio/css.c                             |  8 +--
 drivers/s390/cio/device.c                          | 10 ++--
 drivers/s390/crypto/ap_card.c                      |  2 +-
 drivers/scsi/hpsa.c                                | 10 ++--
 drivers/scsi/lpfc/lpfc_attr.c                      | 64 ++++++++--------------
 .../staging/media/atomisp/pci/atomisp2/hmm/hmm.c   |  8 +--
 drivers/thermal/thermal_sysfs.c                    | 17 +++---
 drivers/tty/serial/sh-sci.c                        |  2 +-
 drivers/usb/host/xhci-dbgcap.c                     |  2 +-
 drivers/usb/phy/phy-tahvo.c                        |  2 +-
 drivers/video/fbdev/auo_k190x.c                    |  4 +-
 drivers/video/fbdev/w100fb.c                       |  4 +-
 include/linux/sysfs.h                              | 14 ++---
 lib/test_firmware.c                                | 14 ++---
 lib/test_kmod.c                                    | 14 ++---
 sound/soc/omap/mcbsp.c                             |  4 +-
 sound/soc/soc-core.c                               |  2 +-
 sound/soc/soc-dapm.c                               |  2 +-
 32 files changed, 120 insertions(+), 158 deletions(-)

-- 
2.15.0

[-next PATCH 4/4] treewide: Use DEVICE_ATTR_WO

[Joe Perches]

Convert DEVICE_ATTR uses to DEVICE_ATTR_WO where possible.

Done with perl script:

$ git grep -w --name-only DEVICE_ATTR | \
  xargs perl -i -e 'local $/; while (<>) { s/\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?(?:\s*S_IWUSR\s*|\s*0200\s*)\)?\s*,\s*NULL\s*,\s*\s_store\s*\)/DEVICE_ATTR_WO(\1)/g; print;}'

Signed-off-by: Joe Perches <joe@perches.com>
---
 arch/s390/kernel/smp.c                 | 2 +-
 arch/x86/kernel/cpu/microcode/core.c   | 2 +-
 drivers/input/touchscreen/elants_i2c.c | 2 +-
 drivers/net/ethernet/ibm/ibmvnic.c     | 2 +-
 drivers/net/wimax/i2400m/sysfs.c       | 3 +--
 drivers/scsi/lpfc/lpfc_attr.c          | 3 +--
 drivers/thermal/thermal_sysfs.c        | 2 +-
 7 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index b8c1a85bcf2d..a919b2f0141d 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -1151,7 +1151,7 @@ static ssize_t __ref rescan_store(struct device *dev,
 	rc = smp_rescan_cpus();
 	return rc ? rc : count;
 }
-static DEVICE_ATTR(rescan, 0200, NULL, rescan_store);
+static DEVICE_ATTR_WO(rescan);
 #endif /* CONFIG_HOTPLUG_CPU */
 
 static int __init s390_smp_init(void)
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index c4fa4a85d4cb..09c74b0560dd 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -560,7 +560,7 @@ static ssize_t pf_show(struct device *dev,
 	return sprintf(buf, "0x%x\n", uci->cpu_sig.pf);
 }
 
-static DEVICE_ATTR(reload, 0200, NULL, reload_store);
+static DEVICE_ATTR_WO(reload);
 static DEVICE_ATTR(version, 0400, version_show, NULL);
 static DEVICE_ATTR(processor_flags, 0400, pf_show, NULL);
 
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index a458e5ec9e41..819213e88f32 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -1000,7 +1000,7 @@ static ssize_t show_iap_mode(struct device *dev,
 				"Normal" : "Recovery");
 }
 
-static DEVICE_ATTR(calibrate, S_IWUSR, NULL, calibrate_store);
+static DEVICE_ATTR_WO(calibrate);
 static DEVICE_ATTR(iap_mode, S_IRUGO, show_iap_mode, NULL);
 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw);
 
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 1dc4aef37d3a..42b96e1a1b13 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -4411,7 +4411,7 @@ static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
 	return count;
 }
 
-static DEVICE_ATTR(failover, 0200, NULL, failover_store);
+static DEVICE_ATTR_WO(failover);
 
 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
 {
diff --git a/drivers/net/wimax/i2400m/sysfs.c b/drivers/net/wimax/i2400m/sysfs.c
index 1237109f251a..8c67df11105c 100644
--- a/drivers/net/wimax/i2400m/sysfs.c
+++ b/drivers/net/wimax/i2400m/sysfs.c
@@ -65,8 +65,7 @@ ssize_t i2400m_idle_timeout_store(struct device *dev,
 }
 
 static
-DEVICE_ATTR(i2400m_idle_timeout, S_IWUSR,
-	    NULL, i2400m_idle_timeout_store);
+DEVICE_ATTR_WO(i2400m_idle_timeout);
 
 static
 struct attribute *i2400m_dev_attrs[] = {
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 517ff203cfde..6ddaf51a23f6 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -2418,8 +2418,7 @@ lpfc_soft_wwn_enable_store(struct device *dev, struct device_attribute *attr,
 
 	return count;
 }
-static DEVICE_ATTR(lpfc_soft_wwn_enable, S_IWUSR, NULL,
-		   lpfc_soft_wwn_enable_store);
+static DEVICE_ATTR_WO(lpfc_soft_wwn_enable);
 
 /**
  * lpfc_soft_wwpn_show - Return the cfg soft ww port name of the adapter
diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 2bc964392924..ba81c9080f6e 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -317,7 +317,7 @@ emul_temp_store(struct device *dev, struct device_attribute *attr,
 
 	return ret ? ret : count;
 }
-static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store);
+static DEVICE_ATTR_WO(emul_temp);
 #endif
 
 static ssize_t
-- 
2.15.0

Re: [-next PATCH 4/4] treewide: Use DEVICE_ATTR_WO

[Borislav Petkov]

On Tue, Dec 19, 2017 at 10:15:09AM -0800, Joe Perches wrote:
> Convert DEVICE_ATTR uses to DEVICE_ATTR_WO where possible.
> 
> Done with perl script:
> 
> $ git grep -w --name-only DEVICE_ATTR | \
>   xargs perl -i -e 'local $/; while (<>) { s/\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?(?:\s*S_IWUSR\s*|\s*0200\s*)\)?\s*,\s*NULL\s*,\s*\s_store\s*\)/DEVICE_ATTR_WO(\1)/g; print;}'
> 
> Signed-off-by: Joe Perches <joe@perches.com>
> ---
>  arch/s390/kernel/smp.c                 | 2 +-
>  arch/x86/kernel/cpu/microcode/core.c   | 2 +-
>  drivers/input/touchscreen/elants_i2c.c | 2 +-
>  drivers/net/ethernet/ibm/ibmvnic.c     | 2 +-
>  drivers/net/wimax/i2400m/sysfs.c       | 3 +--
>  drivers/scsi/lpfc/lpfc_attr.c          | 3 +--
>  drivers/thermal/thermal_sysfs.c        | 2 +-
>  7 files changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
> index b8c1a85bcf2d..a919b2f0141d 100644
> --- a/arch/s390/kernel/smp.c
> +++ b/arch/s390/kernel/smp.c
> @@ -1151,7 +1151,7 @@ static ssize_t __ref rescan_store(struct device *dev,
>  	rc = smp_rescan_cpus();
>  	return rc ? rc : count;
>  }
> -static DEVICE_ATTR(rescan, 0200, NULL, rescan_store);
> +static DEVICE_ATTR_WO(rescan);
>  #endif /* CONFIG_HOTPLUG_CPU */
>  
>  static int __init s390_smp_init(void)
> diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
> index c4fa4a85d4cb..09c74b0560dd 100644
> --- a/arch/x86/kernel/cpu/microcode/core.c
> +++ b/arch/x86/kernel/cpu/microcode/core.c
> @@ -560,7 +560,7 @@ static ssize_t pf_show(struct device *dev,
>  	return sprintf(buf, "0x%x\n", uci->cpu_sig.pf);
>  }
>  
> -static DEVICE_ATTR(reload, 0200, NULL, reload_store);
> +static DEVICE_ATTR_WO(reload);
>  static DEVICE_ATTR(version, 0400, version_show, NULL);
>  static DEVICE_ATTR(processor_flags, 0400, pf_show, NULL);
>  

# cat /sys/devices/system/cpu/microcode/reload
cat: /sys/devices/system/cpu/microcode/reload: Permission denied

The reason for the code churn being?

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

Re: [-next PATCH 4/4] treewide: Use DEVICE_ATTR_WO

[Joe Perches]

On Tue, 2017-12-19 at 19:44 +0100, Borislav Petkov wrote:
> On Tue, Dec 19, 2017 at 10:15:09AM -0800, Joe Perches wrote:
> > Convert DEVICE_ATTR uses to DEVICE_ATTR_WO where possible.
> > 
> > Done with perl script:
> > 
> > $ git grep -w --name-only DEVICE_ATTR | \
> >   xargs perl -i -e 'local $/; while (<>) { s/\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?(?:\s*S_IWUSR\s*|\s*0200\s*)\)?\s*,\s*NULL\s*,\s*\s_store\s*\)/DEVICE_ATTR_WO(\1)/g; print;}'
[]
> > diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
[]
> > @@ -560,7 +560,7 @@ static ssize_t pf_show(struct device *dev,
> >  	return sprintf(buf, "0x%x\n", uci->cpu_sig.pf);
> >  }
> >  
> > -static DEVICE_ATTR(reload, 0200, NULL, reload_store);
> > +static DEVICE_ATTR_WO(reload);
> >  static DEVICE_ATTR(version, 0400, version_show, NULL);
> >  static DEVICE_ATTR(processor_flags, 0400, pf_show, NULL);
> >  
> 
> # cat /sys/devices/system/cpu/microcode/reload
> cat: /sys/devices/system/cpu/microcode/reload: Permission denied

Not different behavior.  It was and remains write only.

> The reason for the code churn being?

Consistency for easier grep by use-type.

Re: [-next PATCH 4/4] treewide: Use DEVICE_ATTR_WO

[Borislav Petkov]

On Tue, Dec 19, 2017 at 10:51:14AM -0800, Joe Perches wrote:
> > The reason for the code churn being?
> 
> Consistency for easier grep by use-type.

Please explain that in the commit message so that we know why it was
changed.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

Re: [-next PATCH 0/4] sysfs and DEVICE_ATTR_<foo>

[Jani Nikula]

On Tue, 19 Dec 2017, Joe Perches <joe@perches.com> wrote:
>  drivers/gpu/drm/i915/i915_sysfs.c                  | 12 ++--

For i915,

Acked-by: Jani Nikula <jani.nikula@intel.com>


-- 
Jani Nikula, Intel Open Source Technology Center

Re: [-next PATCH 0/4] sysfs and DEVICE_ATTR_<foo>

[Corey Minyard]

On 12/19/2017 12:15 PM, Joe Perches wrote:
>   drivers/char/ipmi/ipmi_msghandler.c                | 17 +++---

For ipmi:

Acked-by: Corey Minyard <cminyard@mvista.com>

Re: [-next PATCH 0/4] sysfs and DEVICE_ATTR_<foo>

[Felipe Balbi]

Hi,

Joe Perches <joe@perches.com> writes:
>  drivers/usb/phy/phy-tahvo.c                        |  2 +-

Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>

-- 
balbi

Re: [-next PATCH 4/4] treewide: Use DEVICE_ATTR_WO

[Zhang Rui]

On Tue, 2017-12-19 at 10:15 -0800, Joe Perches wrote:
> Convert DEVICE_ATTR uses to DEVICE_ATTR_WO where possible.
> 
> Done with perl script:
> 
> $ git grep -w --name-only DEVICE_ATTR | \
>   xargs perl -i -e 'local $/; while (<>) {
> s/\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?(?:\s*S_IWUSR\s*|\s*0200\s*)\)?
> \s*,\s*NULL\s*,\s*\s_store\s*\)/DEVICE_ATTR_WO(\1)/g; print;}'
> 
> Signed-off-by: Joe Perches <joe@perches.com>
> ---
>  arch/s390/kernel/smp.c                 | 2 +-
>  arch/x86/kernel/cpu/microcode/core.c   | 2 +-
>  drivers/input/touchscreen/elants_i2c.c | 2 +-
>  drivers/net/ethernet/ibm/ibmvnic.c     | 2 +-
>  drivers/net/wimax/i2400m/sysfs.c       | 3 +--
>  drivers/scsi/lpfc/lpfc_attr.c          | 3 +--
>  drivers/thermal/thermal_sysfs.c        | 2 +-

For the thermal part,
Acked-by: Zhang Rui <rui.zhang@intel.com>

thanks,
rui

>  7 files changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
> index b8c1a85bcf2d..a919b2f0141d 100644
> --- a/arch/s390/kernel/smp.c
> +++ b/arch/s390/kernel/smp.c
> @@ -1151,7 +1151,7 @@ static ssize_t __ref rescan_store(struct device
> *dev,
>  	rc = smp_rescan_cpus();
>  	return rc ? rc : count;
>  }
> -static DEVICE_ATTR(rescan, 0200, NULL, rescan_store);
> +static DEVICE_ATTR_WO(rescan);
>  #endif /* CONFIG_HOTPLUG_CPU */
>  
>  static int __init s390_smp_init(void)
> diff --git a/arch/x86/kernel/cpu/microcode/core.c
> b/arch/x86/kernel/cpu/microcode/core.c
> index c4fa4a85d4cb..09c74b0560dd 100644
> --- a/arch/x86/kernel/cpu/microcode/core.c
> +++ b/arch/x86/kernel/cpu/microcode/core.c
> @@ -560,7 +560,7 @@ static ssize_t pf_show(struct device *dev,
>  	return sprintf(buf, "0x%x\n", uci->cpu_sig.pf);
>  }
>  
> -static DEVICE_ATTR(reload, 0200, NULL, reload_store);
> +static DEVICE_ATTR_WO(reload);
>  static DEVICE_ATTR(version, 0400, version_show, NULL);
>  static DEVICE_ATTR(processor_flags, 0400, pf_show, NULL);
>  
> diff --git a/drivers/input/touchscreen/elants_i2c.c
> b/drivers/input/touchscreen/elants_i2c.c
> index a458e5ec9e41..819213e88f32 100644
> --- a/drivers/input/touchscreen/elants_i2c.c
> +++ b/drivers/input/touchscreen/elants_i2c.c
> @@ -1000,7 +1000,7 @@ static ssize_t show_iap_mode(struct device
> *dev,
>  				"Normal" : "Recovery");
>  }
>  
> -static DEVICE_ATTR(calibrate, S_IWUSR, NULL, calibrate_store);
> +static DEVICE_ATTR_WO(calibrate);
>  static DEVICE_ATTR(iap_mode, S_IRUGO, show_iap_mode, NULL);
>  static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw);
>  
> diff --git a/drivers/net/ethernet/ibm/ibmvnic.c
> b/drivers/net/ethernet/ibm/ibmvnic.c
> index 1dc4aef37d3a..42b96e1a1b13 100644
> --- a/drivers/net/ethernet/ibm/ibmvnic.c
> +++ b/drivers/net/ethernet/ibm/ibmvnic.c
> @@ -4411,7 +4411,7 @@ static ssize_t failover_store(struct device
> *dev, struct device_attribute *attr,
>  	return count;
>  }
>  
> -static DEVICE_ATTR(failover, 0200, NULL, failover_store);
> +static DEVICE_ATTR_WO(failover);
>  
>  static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
>  {
> diff --git a/drivers/net/wimax/i2400m/sysfs.c
> b/drivers/net/wimax/i2400m/sysfs.c
> index 1237109f251a..8c67df11105c 100644
> --- a/drivers/net/wimax/i2400m/sysfs.c
> +++ b/drivers/net/wimax/i2400m/sysfs.c
> @@ -65,8 +65,7 @@ ssize_t i2400m_idle_timeout_store(struct device
> *dev,
>  }
>  
>  static
> -DEVICE_ATTR(i2400m_idle_timeout, S_IWUSR,
> -	    NULL, i2400m_idle_timeout_store);
> +DEVICE_ATTR_WO(i2400m_idle_timeout);
>  
>  static
>  struct attribute *i2400m_dev_attrs[] = {
> diff --git a/drivers/scsi/lpfc/lpfc_attr.c
> b/drivers/scsi/lpfc/lpfc_attr.c
> index 517ff203cfde..6ddaf51a23f6 100644
> --- a/drivers/scsi/lpfc/lpfc_attr.c
> +++ b/drivers/scsi/lpfc/lpfc_attr.c
> @@ -2418,8 +2418,7 @@ lpfc_soft_wwn_enable_store(struct device *dev,
> struct device_attribute *attr,
>  
>  	return count;
>  }
> -static DEVICE_ATTR(lpfc_soft_wwn_enable, S_IWUSR, NULL,
> -		   lpfc_soft_wwn_enable_store);
> +static DEVICE_ATTR_WO(lpfc_soft_wwn_enable);
>  
>  /**
>   * lpfc_soft_wwpn_show - Return the cfg soft ww port name of the
> adapter
> diff --git a/drivers/thermal/thermal_sysfs.c
> b/drivers/thermal/thermal_sysfs.c
> index 2bc964392924..ba81c9080f6e 100644
> --- a/drivers/thermal/thermal_sysfs.c
> +++ b/drivers/thermal/thermal_sysfs.c
> @@ -317,7 +317,7 @@ emul_temp_store(struct device *dev, struct
> device_attribute *attr,
>  
>  	return ret ? ret : count;
>  }
> -static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store);
> +static DEVICE_ATTR_WO(emul_temp);
>  #endif
>  
>  static ssize_t