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From: Krzysztof Kozlowski <krzk@kernel.org>
To: Richard Henderson <rth@twiddle.net>,
	Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
	Matt Turner <mattst88@gmail.com>,
	"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
	Helge Deller <deller@gmx.de>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Rich Felker <dalias@libc.org>, Kalle Valo <kvalo@codeaurora.org>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Dave Jiang <dave.jiang@intel.com>, Jon Mason <jdmason@kudzu.us>,
	Allen Hubbe <allenbh@gmail.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-sh@vger.kernel.org, linux-wireless@vger.kernel.org,
	netdev@vger.kernel.org, linux-ntb@googlegroups.com,
	virtualization@lists.linux-foundation.org,
	linux-arch@vger.kernel.org
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Subject: [PATCH v3 4/4] virtio: pci: Constify ioreadX() iomem argument (as in generic implementation)
Date: Thu,  9 Jul 2020 09:28:37 +0200
Message-ID: <20200709072837.5869-5-krzk@kernel.org> (raw)
In-Reply-To: <20200709072837.5869-1-krzk@kernel.org>

The ioreadX() helpers have inconsistent interface.  On some architectures
void *__iomem address argument is a pointer to const, on some not.

Implementations of ioreadX() do not modify the memory under the address
so they can be converted to a "const" version for const-safety and
consistency among architectures.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 drivers/virtio/virtio_pci_modern.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index db93cedd262f..90eff165a719 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -27,16 +27,16 @@
  * method, i.e. 32-bit accesses for 32-bit fields, 16-bit accesses
  * for 16-bit fields and 8-bit accesses for 8-bit fields.
  */
-static inline u8 vp_ioread8(u8 __iomem *addr)
+static inline u8 vp_ioread8(const u8 __iomem *addr)
 {
 	return ioread8(addr);
 }
-static inline u16 vp_ioread16 (__le16 __iomem *addr)
+static inline u16 vp_ioread16 (const __le16 __iomem *addr)
 {
 	return ioread16(addr);
 }
 
-static inline u32 vp_ioread32(__le32 __iomem *addr)
+static inline u32 vp_ioread32(const __le32 __iomem *addr)
 {
 	return ioread32(addr);
 }
-- 
2.17.1

  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-09  7:28 [PATCH v3 0/4] iomap: Constify ioreadX() iomem argument Krzysztof Kozlowski
2020-07-09  7:28 ` Krzysztof Kozlowski
2020-07-09  7:28 ` [PATCH v3 1/4] iomap: Constify ioreadX() iomem argument (as in generic implementation) Krzysztof Kozlowski
2020-07-09  7:28 ` Krzysztof Kozlowski
2020-07-09  7:32   ` Krzysztof Kozlowski
2020-07-09  7:32   ` Krzysztof Kozlowski
2020-07-09  7:28 ` [PATCH v3 2/4] rtl818x: " Krzysztof Kozlowski
2020-07-09  7:28 ` Krzysztof Kozlowski
2020-07-09  7:28 ` [PATCH v3 3/4] ntb: intel: " Krzysztof Kozlowski
2020-07-09  7:28 ` Krzysztof Kozlowski
2020-07-09  7:28 ` Krzysztof Kozlowski [this message]
2020-07-09  7:28 ` [PATCH v3 4/4] virtio: pci: " Krzysztof Kozlowski

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