From: Borislav Petkov <bp@alien8.de>
To: "Saheed O. Bolarinwa" <refactormyself@gmail.com>
Cc: helgaas@kernel.org, Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Joerg Roedel <joro@8bytes.org>,
bjorn@helgaas.com, skhan@linuxfoundation.org,
linux-kernel-mentees@lists.linuxfoundation.org,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-mtd@lists.infradead.org, iommu@lists.linux-foundation.org,
linux-rdma@vger.kernel.org, linux-ide@vger.kernel.org,
linux-i2c@vger.kernel.org, linux-hwmon@vger.kernel.org,
dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
linux-gpio@vger.kernel.org, linux-fpga@vger.kernel.org,
linux-edac@vger.kernel.org, dmaengine@vger.kernel.org,
linux-crypto@vger.kernel.org,
linux-atm-general@lists.sourceforge.net
Subject: Re: [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Sat, 1 Aug 2020 14:56:57 +0200 [thread overview]
Message-ID: <20200801125657.GA25391@nazgul.tnic> (raw)
In-Reply-To: <20200801112446.149549-1-refactormyself@gmail.com>
On Sat, Aug 01, 2020 at 01:24:29PM +0200, Saheed O. Bolarinwa wrote:
> The return value of pci_read_config_*() may not indicate a device error.
> However, the value read by these functions is more likely to indicate
> this kind of error. This presents two overlapping ways of reporting
> errors and complicates error checking.
So why isn't the *value check done in the pci_read_config_* functions
instead of touching gazillion callers?
For example, pci_conf{1,2}_read() could check whether the u32 *value it
just read depending on the access method, whether that value is ~0 and
return proper PCIBIOS_ error in that case.
The check you're replicating
if (val32 == (u32)~0)
everywhere, instead, is just ugly and tests a naked value ~0 which
doesn't mean anything...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
WARNING: multiple messages have this Message-ID (diff)
From: Borislav Petkov <bp@alien8.de>
To: "Saheed O. Bolarinwa" <refactormyself@gmail.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Joerg Roedel <joro@8bytes.org>,
linux-atm-general@lists.sourceforge.net, helgaas@kernel.org,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
skhan@linuxfoundation.org, bjorn@helgaas.com,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
linux-crypto@vger.kernel.org, dmaengine@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Sat, 1 Aug 2020 14:56:57 +0200 [thread overview]
Message-ID: <20200801125657.GA25391@nazgul.tnic> (raw)
In-Reply-To: <20200801112446.149549-1-refactormyself@gmail.com>
On Sat, Aug 01, 2020 at 01:24:29PM +0200, Saheed O. Bolarinwa wrote:
> The return value of pci_read_config_*() may not indicate a device error.
> However, the value read by these functions is more likely to indicate
> this kind of error. This presents two overlapping ways of reporting
> errors and complicates error checking.
So why isn't the *value check done in the pci_read_config_* functions
instead of touching gazillion callers?
For example, pci_conf{1,2}_read() could check whether the u32 *value it
just read depending on the access method, whether that value is ~0 and
return proper PCIBIOS_ error in that case.
The check you're replicating
if (val32 == (u32)~0)
everywhere, instead, is just ugly and tests a naked value ~0 which
doesn't mean anything...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
WARNING: multiple messages have this Message-ID (diff)
From: Borislav Petkov <bp@alien8.de>
To: "Saheed O. Bolarinwa" <refactormyself@gmail.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
linux-atm-general@lists.sourceforge.net, helgaas@kernel.org,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
skhan@linuxfoundation.org, bjorn@helgaas.com,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
linux-crypto@vger.kernel.org, dmaengine@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Sat, 1 Aug 2020 14:56:57 +0200 [thread overview]
Message-ID: <20200801125657.GA25391@nazgul.tnic> (raw)
In-Reply-To: <20200801112446.149549-1-refactormyself@gmail.com>
On Sat, Aug 01, 2020 at 01:24:29PM +0200, Saheed O. Bolarinwa wrote:
> The return value of pci_read_config_*() may not indicate a device error.
> However, the value read by these functions is more likely to indicate
> this kind of error. This presents two overlapping ways of reporting
> errors and complicates error checking.
So why isn't the *value check done in the pci_read_config_* functions
instead of touching gazillion callers?
For example, pci_conf{1,2}_read() could check whether the u32 *value it
just read depending on the access method, whether that value is ~0 and
return proper PCIBIOS_ error in that case.
The check you're replicating
if (val32 == (u32)~0)
everywhere, instead, is just ugly and tests a naked value ~0 which
doesn't mean anything...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Borislav Petkov <bp@alien8.de>
To: "Saheed O. Bolarinwa" <refactormyself@gmail.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Joerg Roedel <joro@8bytes.org>,
linux-atm-general@lists.sourceforge.net, helgaas@kernel.org,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
linux-crypto@vger.kernel.org, dmaengine@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [Linux-kernel-mentees] [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Sat, 1 Aug 2020 14:56:57 +0200 [thread overview]
Message-ID: <20200801125657.GA25391@nazgul.tnic> (raw)
In-Reply-To: <20200801112446.149549-1-refactormyself@gmail.com>
On Sat, Aug 01, 2020 at 01:24:29PM +0200, Saheed O. Bolarinwa wrote:
> The return value of pci_read_config_*() may not indicate a device error.
> However, the value read by these functions is more likely to indicate
> this kind of error. This presents two overlapping ways of reporting
> errors and complicates error checking.
So why isn't the *value check done in the pci_read_config_* functions
instead of touching gazillion callers?
For example, pci_conf{1,2}_read() could check whether the u32 *value it
just read depending on the access method, whether that value is ~0 and
return proper PCIBIOS_ error in that case.
The check you're replicating
if (val32 == (u32)~0)
everywhere, instead, is just ugly and tests a naked value ~0 which
doesn't mean anything...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
_______________________________________________
Linux-kernel-mentees mailing list
Linux-kernel-mentees@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees
WARNING: multiple messages have this Message-ID (diff)
From: Borislav Petkov <bp@alien8.de>
To: "Saheed O. Bolarinwa" <refactormyself@gmail.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Joerg Roedel <joro@8bytes.org>,
linux-atm-general@lists.sourceforge.net, helgaas@kernel.org,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
skhan@linuxfoundation.org, bjorn@helgaas.com,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
linux-crypto@vger.kernel.org, dmaengine@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Sat, 1 Aug 2020 14:56:57 +0200 [thread overview]
Message-ID: <20200801125657.GA25391@nazgul.tnic> (raw)
In-Reply-To: <20200801112446.149549-1-refactormyself@gmail.com>
On Sat, Aug 01, 2020 at 01:24:29PM +0200, Saheed O. Bolarinwa wrote:
> The return value of pci_read_config_*() may not indicate a device error.
> However, the value read by these functions is more likely to indicate
> this kind of error. This presents two overlapping ways of reporting
> errors and complicates error checking.
So why isn't the *value check done in the pci_read_config_* functions
instead of touching gazillion callers?
For example, pci_conf{1,2}_read() could check whether the u32 *value it
just read depending on the access method, whether that value is ~0 and
return proper PCIBIOS_ error in that case.
The check you're replicating
if (val32 == (u32)~0)
everywhere, instead, is just ugly and tests a naked value ~0 which
doesn't mean anything...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
WARNING: multiple messages have this Message-ID (diff)
From: Borislav Petkov <bp@alien8.de>
To: "Saheed O. Bolarinwa" <refactormyself@gmail.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Joerg Roedel <joro@8bytes.org>,
linux-atm-general@lists.sourceforge.net, helgaas@kernel.org,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
skhan@linuxfoundation.org, bjorn@helgaas.com,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
linux-crypto@vger.kernel.org, dmaengine@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [Intel-gfx] [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Sat, 1 Aug 2020 14:56:57 +0200 [thread overview]
Message-ID: <20200801125657.GA25391@nazgul.tnic> (raw)
In-Reply-To: <20200801112446.149549-1-refactormyself@gmail.com>
On Sat, Aug 01, 2020 at 01:24:29PM +0200, Saheed O. Bolarinwa wrote:
> The return value of pci_read_config_*() may not indicate a device error.
> However, the value read by these functions is more likely to indicate
> this kind of error. This presents two overlapping ways of reporting
> errors and complicates error checking.
So why isn't the *value check done in the pci_read_config_* functions
instead of touching gazillion callers?
For example, pci_conf{1,2}_read() could check whether the u32 *value it
just read depending on the access method, whether that value is ~0 and
return proper PCIBIOS_ error in that case.
The check you're replicating
if (val32 == (u32)~0)
everywhere, instead, is just ugly and tests a naked value ~0 which
doesn't mean anything...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2020-08-01 12:56 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-01 11:24 [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value Saheed O. Bolarinwa
2020-08-01 11:24 ` [Intel-gfx] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 01/17] ata: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 02/17] atm: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-05 10:51 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 03/17] bcma: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 04/17] hwrng: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 05/17] dmaengine: ioat: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 06/17] edac: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 21:38 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 07/17] fpga: altera-cvp: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 22:32 ` kernel test robot
2020-08-05 12:31 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 08/17] gpio: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-18 19:59 ` Bartosz Golaszewski
2020-08-18 19:59 ` [Linux-kernel-mentees] " Bartosz Golaszewski
2020-08-19 2:21 ` Bjorn Helgaas
2020-08-19 2:21 ` [Linux-kernel-mentees] " Bjorn Helgaas
2020-08-01 11:24 ` [RFC PATCH 09/17] drm/i915/vga: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Intel-gfx] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 10/17] hwmon: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-04 21:26 ` Guenter Roeck
2020-08-04 21:26 ` [Linux-kernel-mentees] " Guenter Roeck
2020-08-01 11:24 ` [RFC PATCH 11/17] intel_th: pci: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 12/17] i2c: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 13/17] ide: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 14/17] IB: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 14:18 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 15/17] iommu/vt-d: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 16/17] mtd: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 17/17] net: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 14:58 ` kernel test robot
2020-08-01 12:56 ` Borislav Petkov [this message]
2020-08-01 12:56 ` [Intel-gfx] [RFC PATCH 00/17] " Borislav Petkov
2020-08-01 12:56 ` Borislav Petkov
2020-08-01 12:56 ` [Linux-kernel-mentees] " Borislav Petkov
2020-08-01 12:56 ` Borislav Petkov
2020-08-01 12:56 ` Borislav Petkov
2020-08-02 14:53 ` Tom Rix
2020-08-02 14:53 ` [Intel-gfx] " Tom Rix
2020-08-02 14:53 ` Tom Rix
2020-08-02 14:53 ` [Linux-kernel-mentees] " Tom Rix
2020-08-02 14:53 ` Tom Rix
2020-08-02 14:53 ` Tom Rix
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 17:28 ` [Intel-gfx] " Saheed Bolarinwa
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 17:28 ` [Linux-kernel-mentees] " Saheed Bolarinwa
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 18:46 ` [Intel-gfx] " Borislav Petkov
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 18:46 ` [Linux-kernel-mentees] " Borislav Petkov
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 19:14 ` [Intel-gfx] " Bjorn Helgaas
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 19:14 ` [Linux-kernel-mentees] " Bjorn Helgaas
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 20:18 ` Borislav Petkov
2020-08-02 20:18 ` [Intel-gfx] " Borislav Petkov
2020-08-02 20:18 ` Borislav Petkov
2020-08-02 20:18 ` [Linux-kernel-mentees] " Borislav Petkov
2020-08-02 20:18 ` Borislav Petkov
2020-08-02 20:18 ` Borislav Petkov
2020-08-03 6:56 ` Christoph Hellwig
2020-08-03 6:56 ` [Intel-gfx] " Christoph Hellwig
2020-08-03 6:56 ` [Linux-kernel-mentees] " Christoph Hellwig
2020-08-03 6:56 ` Christoph Hellwig
2020-08-03 6:56 ` Christoph Hellwig
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