From: Krzysztof Kozlowski <krzk@kernel.org>
To: Richard Henderson <rth@twiddle.net>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Matt Turner <mattst88@gmail.com>,
Alexey Brodkin <abrodkin@synopsys.com>,
Vineet Gupta <vgupta@synopsys.com>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Helge Deller <deller@gmx.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>, Dave Airlie <airlied@redhat.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Ben Skeggs <bskeggs@redhat.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Jiri Slaby <jirislaby@gmail.com>,
Nick Kossifidis <mickflemm@gmail.com>,
Luis Chamberlain <mcgrof@kernel.org>,
Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>,
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>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org,
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Cc: Krzysztof Kozlowski <krzk@kernel.org>
Subject: [RFT 02/13] alpha: Constify ioreadX() iomem argument (as in generic implementation)
Date: Tue, 7 Jan 2020 17:52:59 +0100 [thread overview]
Message-ID: <1578415992-24054-3-git-send-email-krzk@kernel.org> (raw)
In-Reply-To: <1578415992-24054-1-git-send-email-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>
---
arch/alpha/include/asm/core_apecs.h | 6 +++---
arch/alpha/include/asm/core_cia.h | 6 +++---
arch/alpha/include/asm/core_lca.h | 6 +++---
arch/alpha/include/asm/core_marvel.h | 4 ++--
arch/alpha/include/asm/core_mcpcia.h | 6 +++---
arch/alpha/include/asm/core_t2.h | 2 +-
arch/alpha/include/asm/io.h | 12 ++++++------
arch/alpha/include/asm/io_trivial.h | 16 ++++++++--------
arch/alpha/include/asm/jensen.h | 2 +-
arch/alpha/include/asm/machvec.h | 6 +++---
arch/alpha/kernel/core_marvel.c | 2 +-
arch/alpha/kernel/io.c | 6 +++---
12 files changed, 37 insertions(+), 37 deletions(-)
diff --git a/arch/alpha/include/asm/core_apecs.h b/arch/alpha/include/asm/core_apecs.h
index 0a07055bc0fe..2d9726fc02ef 100644
--- a/arch/alpha/include/asm/core_apecs.h
+++ b/arch/alpha/include/asm/core_apecs.h
@@ -384,7 +384,7 @@ struct el_apecs_procdata
} \
} while (0)
-__EXTERN_INLINE unsigned int apecs_ioread8(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int apecs_ioread8(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
unsigned long result, base_and_type;
@@ -420,7 +420,7 @@ __EXTERN_INLINE void apecs_iowrite8(u8 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + base_and_type) = w;
}
-__EXTERN_INLINE unsigned int apecs_ioread16(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int apecs_ioread16(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
unsigned long result, base_and_type;
@@ -456,7 +456,7 @@ __EXTERN_INLINE void apecs_iowrite16(u16 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + base_and_type) = w;
}
-__EXTERN_INLINE unsigned int apecs_ioread32(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int apecs_ioread32(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
if (addr < APECS_DENSE_MEM)
diff --git a/arch/alpha/include/asm/core_cia.h b/arch/alpha/include/asm/core_cia.h
index c706a7f2b061..cb22991f6761 100644
--- a/arch/alpha/include/asm/core_cia.h
+++ b/arch/alpha/include/asm/core_cia.h
@@ -342,7 +342,7 @@ struct el_CIA_sysdata_mcheck {
#define vuip volatile unsigned int __force *
#define vulp volatile unsigned long __force *
-__EXTERN_INLINE unsigned int cia_ioread8(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int cia_ioread8(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
unsigned long result, base_and_type;
@@ -374,7 +374,7 @@ __EXTERN_INLINE void cia_iowrite8(u8 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + base_and_type) = w;
}
-__EXTERN_INLINE unsigned int cia_ioread16(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int cia_ioread16(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
unsigned long result, base_and_type;
@@ -404,7 +404,7 @@ __EXTERN_INLINE void cia_iowrite16(u16 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + base_and_type) = w;
}
-__EXTERN_INLINE unsigned int cia_ioread32(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int cia_ioread32(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
if (addr < CIA_DENSE_MEM)
diff --git a/arch/alpha/include/asm/core_lca.h b/arch/alpha/include/asm/core_lca.h
index 84d5e5b84f4f..ec86314418cb 100644
--- a/arch/alpha/include/asm/core_lca.h
+++ b/arch/alpha/include/asm/core_lca.h
@@ -230,7 +230,7 @@ union el_lca {
} while (0)
-__EXTERN_INLINE unsigned int lca_ioread8(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int lca_ioread8(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
unsigned long result, base_and_type;
@@ -266,7 +266,7 @@ __EXTERN_INLINE void lca_iowrite8(u8 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + base_and_type) = w;
}
-__EXTERN_INLINE unsigned int lca_ioread16(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int lca_ioread16(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
unsigned long result, base_and_type;
@@ -302,7 +302,7 @@ __EXTERN_INLINE void lca_iowrite16(u16 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + base_and_type) = w;
}
-__EXTERN_INLINE unsigned int lca_ioread32(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int lca_ioread32(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
if (addr < LCA_DENSE_MEM)
diff --git a/arch/alpha/include/asm/core_marvel.h b/arch/alpha/include/asm/core_marvel.h
index cc6fd92d5fa9..b266e02e284b 100644
--- a/arch/alpha/include/asm/core_marvel.h
+++ b/arch/alpha/include/asm/core_marvel.h
@@ -332,10 +332,10 @@ struct io7 {
#define vucp volatile unsigned char __force *
#define vusp volatile unsigned short __force *
-extern unsigned int marvel_ioread8(void __iomem *);
+extern unsigned int marvel_ioread8(const void __iomem *);
extern void marvel_iowrite8(u8 b, void __iomem *);
-__EXTERN_INLINE unsigned int marvel_ioread16(void __iomem *addr)
+__EXTERN_INLINE unsigned int marvel_ioread16(const void __iomem *addr)
{
return __kernel_ldwu(*(vusp)addr);
}
diff --git a/arch/alpha/include/asm/core_mcpcia.h b/arch/alpha/include/asm/core_mcpcia.h
index b30dc128210d..cb24d1bd6141 100644
--- a/arch/alpha/include/asm/core_mcpcia.h
+++ b/arch/alpha/include/asm/core_mcpcia.h
@@ -267,7 +267,7 @@ extern inline int __mcpcia_is_mmio(unsigned long addr)
return (addr & 0x80000000UL) == 0;
}
-__EXTERN_INLINE unsigned int mcpcia_ioread8(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int mcpcia_ioread8(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
@@ -291,7 +291,7 @@ __EXTERN_INLINE void mcpcia_iowrite8(u8 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + hose + 0x00) = w;
}
-__EXTERN_INLINE unsigned int mcpcia_ioread16(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int mcpcia_ioread16(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
@@ -315,7 +315,7 @@ __EXTERN_INLINE void mcpcia_iowrite16(u16 b, void __iomem *xaddr)
*(vuip) ((addr << 5) + hose + 0x08) = w;
}
-__EXTERN_INLINE unsigned int mcpcia_ioread32(void __iomem *xaddr)
+__EXTERN_INLINE unsigned int mcpcia_ioread32(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr;
diff --git a/arch/alpha/include/asm/core_t2.h b/arch/alpha/include/asm/core_t2.h
index e0b33d09e93a..12bb7addc789 100644
--- a/arch/alpha/include/asm/core_t2.h
+++ b/arch/alpha/include/asm/core_t2.h
@@ -572,7 +572,7 @@ __EXTERN_INLINE int t2_is_mmio(const volatile void __iomem *addr)
it doesn't make sense to merge the pio and mmio routines. */
#define IOPORT(OS, NS) \
-__EXTERN_INLINE unsigned int t2_ioread##NS(void __iomem *xaddr) \
+__EXTERN_INLINE unsigned int t2_ioread##NS(const void __iomem *xaddr) \
{ \
if (t2_is_mmio(xaddr)) \
return t2_read##OS(xaddr); \
diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index d1ed5a8133c5..cc12ec74175c 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -151,9 +151,9 @@ static inline void generic_##NAME(TYPE b, QUAL void __iomem *addr) \
alpha_mv.mv_##NAME(b, addr); \
}
-REMAP1(unsigned int, ioread8, /**/)
-REMAP1(unsigned int, ioread16, /**/)
-REMAP1(unsigned int, ioread32, /**/)
+REMAP1(unsigned int, ioread8, const)
+REMAP1(unsigned int, ioread16, const)
+REMAP1(unsigned int, ioread32, const)
REMAP1(u8, readb, const volatile)
REMAP1(u16, readw, const volatile)
REMAP1(u32, readl, const volatile)
@@ -308,14 +308,14 @@ static inline int __is_mmio(const volatile void __iomem *addr)
*/
#if IO_CONCAT(__IO_PREFIX,trivial_io_bw)
-extern inline unsigned int ioread8(void __iomem *addr)
+extern inline unsigned int ioread8(const void __iomem *addr)
{
unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr);
mb();
return ret;
}
-extern inline unsigned int ioread16(void __iomem *addr)
+extern inline unsigned int ioread16(const void __iomem *addr)
{
unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr);
mb();
@@ -356,7 +356,7 @@ extern inline void outw(u16 b, unsigned long port)
#endif
#if IO_CONCAT(__IO_PREFIX,trivial_io_lq)
-extern inline unsigned int ioread32(void __iomem *addr)
+extern inline unsigned int ioread32(const void __iomem *addr)
{
unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr);
mb();
diff --git a/arch/alpha/include/asm/io_trivial.h b/arch/alpha/include/asm/io_trivial.h
index ba3d8f0cfe0c..a1a29cbe02fa 100644
--- a/arch/alpha/include/asm/io_trivial.h
+++ b/arch/alpha/include/asm/io_trivial.h
@@ -7,15 +7,15 @@
#if IO_CONCAT(__IO_PREFIX,trivial_io_bw)
__EXTERN_INLINE unsigned int
-IO_CONCAT(__IO_PREFIX,ioread8)(void __iomem *a)
+IO_CONCAT(__IO_PREFIX,ioread8)(const void __iomem *a)
{
- return __kernel_ldbu(*(volatile u8 __force *)a);
+ return __kernel_ldbu(*(const volatile u8 __force *)a);
}
__EXTERN_INLINE unsigned int
-IO_CONCAT(__IO_PREFIX,ioread16)(void __iomem *a)
+IO_CONCAT(__IO_PREFIX,ioread16)(const void __iomem *a)
{
- return __kernel_ldwu(*(volatile u16 __force *)a);
+ return __kernel_ldwu(*(const volatile u16 __force *)a);
}
__EXTERN_INLINE void
@@ -33,9 +33,9 @@ IO_CONCAT(__IO_PREFIX,iowrite16)(u16 b, void __iomem *a)
#if IO_CONCAT(__IO_PREFIX,trivial_io_lq)
__EXTERN_INLINE unsigned int
-IO_CONCAT(__IO_PREFIX,ioread32)(void __iomem *a)
+IO_CONCAT(__IO_PREFIX,ioread32)(const void __iomem *a)
{
- return *(volatile u32 __force *)a;
+ return *(const volatile u32 __force *)a;
}
__EXTERN_INLINE void
@@ -73,14 +73,14 @@ IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a)
__EXTERN_INLINE u8
IO_CONCAT(__IO_PREFIX,readb)(const volatile void __iomem *a)
{
- void __iomem *addr = (void __iomem *)a;
+ const void __iomem *addr = (const void __iomem *)a;
return IO_CONCAT(__IO_PREFIX,ioread8)(addr);
}
__EXTERN_INLINE u16
IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a)
{
- void __iomem *addr = (void __iomem *)a;
+ const void __iomem *addr = (const void __iomem *)a;
return IO_CONCAT(__IO_PREFIX,ioread16)(addr);
}
diff --git a/arch/alpha/include/asm/jensen.h b/arch/alpha/include/asm/jensen.h
index 436dc905b6ad..916895155a88 100644
--- a/arch/alpha/include/asm/jensen.h
+++ b/arch/alpha/include/asm/jensen.h
@@ -305,7 +305,7 @@ __EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
that it doesn't make sense to merge them. */
#define IOPORT(OS, NS) \
-__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \
+__EXTERN_INLINE unsigned int jensen_ioread##NS(const void __iomem *xaddr) \
{ \
if (jensen_is_mmio(xaddr)) \
return jensen_read##OS(xaddr - 0x100000000ul); \
diff --git a/arch/alpha/include/asm/machvec.h b/arch/alpha/include/asm/machvec.h
index a6b73c6d10ee..a4e96e2bec74 100644
--- a/arch/alpha/include/asm/machvec.h
+++ b/arch/alpha/include/asm/machvec.h
@@ -46,9 +46,9 @@ struct alpha_machine_vector
void (*mv_pci_tbi)(struct pci_controller *hose,
dma_addr_t start, dma_addr_t end);
- unsigned int (*mv_ioread8)(void __iomem *);
- unsigned int (*mv_ioread16)(void __iomem *);
- unsigned int (*mv_ioread32)(void __iomem *);
+ unsigned int (*mv_ioread8)(const void __iomem *);
+ unsigned int (*mv_ioread16)(const void __iomem *);
+ unsigned int (*mv_ioread32)(const void __iomem *);
void (*mv_iowrite8)(u8, void __iomem *);
void (*mv_iowrite16)(u16, void __iomem *);
diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c
index 1db9d0eb2922..37514422f586 100644
--- a/arch/alpha/kernel/core_marvel.c
+++ b/arch/alpha/kernel/core_marvel.c
@@ -807,7 +807,7 @@ void __iomem *marvel_ioportmap (unsigned long addr)
}
unsigned int
-marvel_ioread8(void __iomem *xaddr)
+marvel_ioread8(const void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
if (__marvel_is_port_kbd(addr))
diff --git a/arch/alpha/kernel/io.c b/arch/alpha/kernel/io.c
index c025a3e5e357..e49918b91fee 100644
--- a/arch/alpha/kernel/io.c
+++ b/arch/alpha/kernel/io.c
@@ -14,21 +14,21 @@
"generic", which bumps through the machine vector. */
unsigned int
-ioread8(void __iomem *addr)
+ioread8(const void __iomem *addr)
{
unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr);
mb();
return ret;
}
-unsigned int ioread16(void __iomem *addr)
+unsigned int ioread16(const void __iomem *addr)
{
unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr);
mb();
return ret;
}
-unsigned int ioread32(void __iomem *addr)
+unsigned int ioread32(const void __iomem *addr)
{
unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr);
mb();
--
2.7.4
next prev parent reply other threads:[~2020-01-07 16:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 16:52 [RFT 00/13] iomap: Constify ioreadX() iomem argument Krzysztof Kozlowski
2020-01-07 16:52 ` [RFT 01/13] iomap: Constify ioreadX() iomem argument (as in generic implementation) Krzysztof Kozlowski
2020-01-07 16:52 ` Krzysztof Kozlowski [this message]
2020-01-07 16:53 ` [RFT 02/13] sh: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 03/13] alpha: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 03/13] sh: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 04/13] parisc: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 05/13] powerpc: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 06/13] arc: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 07/13] drm/mgag200: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 08/13] drm/nouveau: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 09/13] media: fsl-viu: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 10/13] net: wireless: ath5k: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 11/13] net: wireless: rtl818x: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 12/13] ntb: intel: " Krzysztof Kozlowski
2020-01-07 16:53 ` [RFT 13/13] virtio: pci: " Krzysztof Kozlowski
[not found] ` <CAMuHMdW4ek0OYQDrrbcpZjNUTTP04nSbwkmiZvBmKcU=PQM9qA@mail.gmail.com>
[not found] ` <CAMuHMdUBmYtJKtSYzS_5u67hVZOqcKSgFY1rDGme6gLNRBJ_gA@mail.gmail.com>
[not found] ` <CAJKOXPfq9vS4kSyx1jOPHBvi9_HjviRv0LU2A8ZwdmqgUuebHQ@mail.gmail.com>
2020-01-08 8:35 ` [RFT 00/13] iomap: Constify ioreadX() iomem argument Christophe Leroy
2020-01-08 8:43 ` Geert Uytterhoeven
2020-01-08 8:48 ` Christophe Leroy
2020-01-08 8:44 ` Arnd Bergmann
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