Message-ID: <20211126223824.263656943@linutronix.de>
From:   Thomas Gleixner <tglx@linutronix.de>
To:     LKML <linux-kernel@vger.kernel.org>
Cc:     Bjorn Helgaas <helgaas@kernel.org>, Marc Zygnier <maz@kernel.org>,
        Alex Williamson <alex.williamson@redhat.com>,
        Kevin Tian <kevin.tian@intel.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Megha Dey <megha.dey@intel.com>,
        Ashok Raj <ashok.raj@intel.com>, linux-pci@vger.kernel.org,
        Michael Ellerman <mpe@ellerman.id.au>,
        Paul Mackerras <paulus@samba.org>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        linuxppc-dev@lists.ozlabs.org,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        linux-mips@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        sparclinux@vger.kernel.org, x86@kernel.org,
        xen-devel@lists.xenproject.org, ath11k@lists.infradead.org,
        Wei Liu <wei.liu@kernel.org>, linux-hyperv@vger.kernel.org,
        Juergen Gross <jgross@suse.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Heiko Carstens <hca@linux.ibm.com>
Subject: [patch 03/22] genirq/msi: Guard sysfs code
References: <20211126222700.862407977@linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Date:   Sat, 27 Nov 2021 02:18:39 +0100 (CET)
Precedence: bulk

No point in building unused code when CONFIG_SYSFS=n.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/msi.h |   10 ++++++++++
 kernel/irq/msi.c    |    2 ++
 2 files changed, 12 insertions(+)

--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -239,9 +239,19 @@ void __pci_write_msi_msg(struct msi_desc
 void pci_msi_mask_irq(struct irq_data *data);
 void pci_msi_unmask_irq(struct irq_data *data);
 
+#ifdef CONFIG_SYSFS
 const struct attribute_group **msi_populate_sysfs(struct device *dev);
 void msi_destroy_sysfs(struct device *dev,
 		       const struct attribute_group **msi_irq_groups);
+#else
+static inline const struct attribute_group **msi_populate_sysfs(struct device *dev)
+{
+	return NULL;
+}
+static inline void msi_destroy_sysfs(struct device *dev, const struct attribute_group **msi_irq_groups)
+{
+}
+#endif
 
 /*
  * The arch hooks to setup up msi irqs. Default functions are implemented
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -72,6 +72,7 @@ void get_cached_msi_msg(unsigned int irq
 }
 EXPORT_SYMBOL_GPL(get_cached_msi_msg);
 
+#ifdef CONFIG_SYSFS
 static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
@@ -204,6 +205,7 @@ void msi_destroy_sysfs(struct device *de
 		kfree(msi_irq_groups);
 	}
 }
+#endif
 
 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
 static inline void irq_chip_write_msi_msg(struct irq_data *data,