linux-kernel - [PATCH 1/2 v2] IB/qib: don't use qib_wc_x86

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Date:   Wed, 30 Nov 2022 12:09:45 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        linux-rdma@...r.kernel.org, Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        linux-um@...ts.infradead.org
Subject: [PATCH 1/2 v2] IB/qib: don't use qib_wc_x86_64 for UML

When building qib_wc_x86_64.c on ARCH=um, references to some cpuinfo
fields cause build errors since cpuinfo does not contain x86-specific
fields.

Fix the build errors by making this driver depend on !UML.

Prevents these build errors:

../drivers/infiniband/hw/qib/qib_wc_x86_64.c: In function ‘qib_unordered_wc’:
../drivers/infiniband/hw/qib/qib_wc_x86_64.c:149:29: error: ‘struct cpuinfo_um’ has no member named ‘x86_vendor’
  149 |         return boot_cpu_data.x86_vendor != X86_VENDOR_AMD;
../drivers/infiniband/hw/qib/qib_wc_x86_64.c:149:44: error: ‘X86_VENDOR_AMD’ undeclared (first use in this function); did you mean ‘X86_VENDOR_ANY’?
  149 |         return boot_cpu_data.x86_vendor != X86_VENDOR_AMD;
../drivers/infiniband/hw/qib/qib_wc_x86_64.c:149:44: note: each undeclared identifier is reported only once for each function it appears in
../drivers/infiniband/hw/qib/qib_wc_x86_64.c:150:1: error: control reaches end of non-void function [-Werror=return-type]
  150 | }

Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Jason Gunthorpe <jgg@...dia.com>
Cc: Leon Romanovsky <leon@...nel.org>
Cc: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>
Cc: linux-rdma@...r.kernel.org
Cc: Jeff Dike <jdike@...toit.com>
Cc: Richard Weinberger <richard@....at>
Cc: Anton Ivanov <anton.ivanov@...bridgegreys.com>
Cc: Johannes Berg <johannes@...solutions.net>
Cc: linux-um@...ts.infradead.org
---
v2: rebase & resend

 drivers/infiniband/hw/qib/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff -- a/drivers/infiniband/hw/qib/Kconfig b/drivers/infiniband/hw/qib/Kconfig
--- a/drivers/infiniband/hw/qib/Kconfig
+++ b/drivers/infiniband/hw/qib/Kconfig
@@ -3,6 +3,7 @@ config INFINIBAND_QIB
 	tristate "Intel PCIe HCA support"
 	depends on 64BIT && INFINIBAND_RDMAVT
 	depends on PCI
+	depends on !UML
 	help
 	This is a low-level driver for Intel PCIe QLE InfiniBand host
 	channel adapters.  This driver does not support the Intel