* [PATCH] riscv: use generic MMIO accessors
@ 2025-05-30 3:22 Qingfang Deng
2025-05-31 13:55 ` kernel test robot
2025-06-05 0:51 ` kernel test robot
0 siblings, 2 replies; 3+ messages in thread
From: Qingfang Deng @ 2025-05-30 3:22 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
linux-riscv, linux-kernel
RISC-V IO just reads/writes the memory location directly, so remove
those __raw_read/write* definitions and use the generic accessors
instead.
The __io_reads_ins and __io_writes_outs macros are updated accordingly,
as they don't have access to the generic accessors.
Simplifies the code with no functional change.
Signed-off-by: Qingfang Deng <dqfext@gmail.com>
---
arch/riscv/include/asm/io.h | 4 +--
arch/riscv/include/asm/mmio.h | 65 -----------------------------------
2 files changed, 2 insertions(+), 67 deletions(-)
diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h
index a0e51840b9db..6cee9d083d3c 100644
--- a/arch/riscv/include/asm/io.h
+++ b/arch/riscv/include/asm/io.h
@@ -68,7 +68,7 @@
ctype *buf = buffer; \
\
do { \
- ctype x = __raw_read ## len(addr); \
+ ctype x = *(const volatile ctype __force *)addr;\
*buf++ = x; \
} while (--count); \
} \
@@ -85,7 +85,7 @@
const ctype *buf = buffer; \
\
do { \
- __raw_write ## len(*buf++, addr); \
+ *(volatile ctype __force *)addr = *buf++; \
} while (--count); \
} \
afence; \
diff --git a/arch/riscv/include/asm/mmio.h b/arch/riscv/include/asm/mmio.h
index 06cadfd7a237..61286ee65f0b 100644
--- a/arch/riscv/include/asm/mmio.h
+++ b/arch/riscv/include/asm/mmio.h
@@ -15,71 +15,6 @@
#include <asm/fence.h>
#include <asm/mmiowb.h>
-/* Generic IO read/write. These perform native-endian accesses. */
-#define __raw_writeb __raw_writeb
-static inline void __raw_writeb(u8 val, volatile void __iomem *addr)
-{
- asm volatile("sb %0, 0(%1)" : : "r" (val), "r" (addr));
-}
-
-#define __raw_writew __raw_writew
-static inline void __raw_writew(u16 val, volatile void __iomem *addr)
-{
- asm volatile("sh %0, 0(%1)" : : "r" (val), "r" (addr));
-}
-
-#define __raw_writel __raw_writel
-static inline void __raw_writel(u32 val, volatile void __iomem *addr)
-{
- asm volatile("sw %0, 0(%1)" : : "r" (val), "r" (addr));
-}
-
-#ifdef CONFIG_64BIT
-#define __raw_writeq __raw_writeq
-static inline void __raw_writeq(u64 val, volatile void __iomem *addr)
-{
- asm volatile("sd %0, 0(%1)" : : "r" (val), "r" (addr));
-}
-#endif
-
-#define __raw_readb __raw_readb
-static inline u8 __raw_readb(const volatile void __iomem *addr)
-{
- u8 val;
-
- asm volatile("lb %0, 0(%1)" : "=r" (val) : "r" (addr));
- return val;
-}
-
-#define __raw_readw __raw_readw
-static inline u16 __raw_readw(const volatile void __iomem *addr)
-{
- u16 val;
-
- asm volatile("lh %0, 0(%1)" : "=r" (val) : "r" (addr));
- return val;
-}
-
-#define __raw_readl __raw_readl
-static inline u32 __raw_readl(const volatile void __iomem *addr)
-{
- u32 val;
-
- asm volatile("lw %0, 0(%1)" : "=r" (val) : "r" (addr));
- return val;
-}
-
-#ifdef CONFIG_64BIT
-#define __raw_readq __raw_readq
-static inline u64 __raw_readq(const volatile void __iomem *addr)
-{
- u64 val;
-
- asm volatile("ld %0, 0(%1)" : "=r" (val) : "r" (addr));
- return val;
-}
-#endif
-
/*
* Unordered I/O memory access primitives. These are even more relaxed than
* the relaxed versions, as they don't even order accesses between successive
--
2.43.0
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] riscv: use generic MMIO accessors
2025-05-30 3:22 [PATCH] riscv: use generic MMIO accessors Qingfang Deng
@ 2025-05-31 13:55 ` kernel test robot
2025-06-05 0:51 ` kernel test robot
1 sibling, 0 replies; 3+ messages in thread
From: kernel test robot @ 2025-05-31 13:55 UTC (permalink / raw)
To: Qingfang Deng, Paul Walmsley, Palmer Dabbelt, Albert Ou,
Alexandre Ghiti, linux-riscv, linux-kernel
Cc: llvm, oe-kbuild-all
Hi Qingfang,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.15]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Qingfang-Deng/riscv-use-generic-MMIO-accessors/20250530-112455
base: linus/master
patch link: https://lore.kernel.org/r/20250530032252.3092502-1-dqfext%40gmail.com
patch subject: [PATCH] riscv: use generic MMIO accessors
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20250531/202505312115.47xDnzAe-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250531/202505312115.47xDnzAe-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505312115.47xDnzAe-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/omapdrm/dss/dispc.c:4720:27: warning: stack frame size (2304) exceeds limit (2048) in 'dispc_runtime_suspend' [-Wframe-larger-than]
4720 | static __maybe_unused int dispc_runtime_suspend(struct device *dev)
| ^
drivers/gpu/drm/omapdrm/dss/dispc.c:4735:27: warning: stack frame size (2432) exceeds limit (2048) in 'dispc_runtime_resume' [-Wframe-larger-than]
4735 | static __maybe_unused int dispc_runtime_resume(struct device *dev)
| ^
2 warnings generated.
vim +/dispc_runtime_suspend +4720 drivers/gpu/drm/omapdrm/dss/dispc.c
060b6d9cbab03f drivers/video/omap2/dss/dispc.c Senthilvadivu Guruswamy 2011-01-24 4719
d6c75c295f67b2 drivers/gpu/drm/omapdrm/dss/dispc.c Arnd Bergmann 2021-12-05 @4720 static __maybe_unused int dispc_runtime_suspend(struct device *dev)
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4721 {
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4722 struct dispc_device *dispc = dev_get_drvdata(dev);
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4723
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4724 dispc->is_enabled = false;
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4725 /* ensure the dispc_irq_handler sees the is_enabled value */
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4726 smp_wmb();
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4727 /* wait for current handler to finish before turning the DISPC off */
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4728 synchronize_irq(dispc->irq);
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4729
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4730 dispc_save_context(dispc);
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4731
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4732 return 0;
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4733 }
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4734
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] riscv: use generic MMIO accessors
2025-05-30 3:22 [PATCH] riscv: use generic MMIO accessors Qingfang Deng
2025-05-31 13:55 ` kernel test robot
@ 2025-06-05 0:51 ` kernel test robot
1 sibling, 0 replies; 3+ messages in thread
From: kernel test robot @ 2025-06-05 0:51 UTC (permalink / raw)
To: Qingfang Deng, Paul Walmsley, Palmer Dabbelt, Albert Ou,
Alexandre Ghiti, linux-riscv, linux-kernel
Cc: llvm, oe-kbuild-all
Hi Qingfang,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v6.15 next-20250604]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Qingfang-Deng/riscv-use-generic-MMIO-accessors/20250530-112455
base: linus/master
patch link: https://lore.kernel.org/r/20250530032252.3092502-1-dqfext%40gmail.com
patch subject: [PATCH] riscv: use generic MMIO accessors
config: riscv-randconfig-001-20250605 (https://download.01.org/0day-ci/archive/20250605/202506050828.Dktas7qm-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250605/202506050828.Dktas7qm-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506050828.Dktas7qm-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:7:
In file included from include/linux/gfp.h:7:
In file included from include/linux/mmzone.h:22:
In file included from include/linux/mm_types.h:16:
In file included from include/linux/uprobes.h:18:
In file included from include/linux/timer.h:6:
In file included from include/linux/ktime.h:25:
In file included from include/linux/jiffies.h:10:
In file included from include/linux/time.h:60:
In file included from include/linux/time32.h:13:
In file included from include/linux/timex.h:67:
>> arch/riscv/include/asm/timex.h:20:9: error: call to undeclared function '__raw_readq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
20 | return readq_relaxed(clint_time_val);
| ^
arch/riscv/include/asm/mmio.h:59:56: note: expanded from macro 'readq_relaxed'
59 | #define readq_relaxed(c) ({ u64 __v; __io_rbr(); __v = readq_cpu(c); __io_rar(); __v; })
| ^
arch/riscv/include/asm/mmio.h:32:64: note: expanded from macro 'readq_cpu'
32 | #define readq_cpu(c) ({ u64 __r = le64_to_cpu((__force __le64)__raw_readq(c)); __r; })
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:99:4: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
99 | set->sig[1] | set->sig[0]) == 0;
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:101:11: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
101 | return (set->sig[1] | set->sig[0]) == 0;
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:114:27: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:115:5: warning: array index 2 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:115:21: warning: array index 2 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:116:5: warning: array index 1 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
116 | (set1->sig[1] == set2->sig[1]) &&
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
--
175 | set->sig[2] = op(set->sig[2]); \
| ^ ~
include/linux/signal.h:186:24: note: expanded from macro '_sig_not'
186 | #define _sig_not(x) (~(x))
| ^
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:187:1: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
187 | _SIG_SET_OP(signotset, _sig_not)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:175:3: note: expanded from macro '_SIG_SET_OP'
175 | set->sig[2] = op(set->sig[2]); \
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:187:1: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
187 | _SIG_SET_OP(signotset, _sig_not)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:177:27: note: expanded from macro '_SIG_SET_OP'
177 | case 2: set->sig[1] = op(set->sig[1]); \
| ^ ~
include/linux/signal.h:186:24: note: expanded from macro '_sig_not'
186 | #define _sig_not(x) (~(x))
| ^
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:187:1: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
187 | _SIG_SET_OP(signotset, _sig_not)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:177:10: note: expanded from macro '_SIG_SET_OP'
177 | case 2: set->sig[1] = op(set->sig[1]); \
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:198:10: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
198 | case 2: set->sig[1] = 0;
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:211:10: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
211 | case 2: set->sig[1] = -1;
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:242:10: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
242 | case 2: set->sig[1] = 0;
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:8:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:255:10: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
255 | case 2: set->sig[1] = -1;
| ^ ~
include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
62 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/riscv/kernel/asm-offsets.c:10:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:136:
>> include/asm-generic/io.h:140:19: error: static declaration of '__raw_readq' follows non-static declaration
140 | static inline u64 __raw_readq(const volatile void __iomem *addr)
| ^
include/asm-generic/io.h:139:21: note: expanded from macro '__raw_readq'
139 | #define __raw_readq __raw_readq
| ^
arch/riscv/include/asm/timex.h:20:9: note: previous implicit declaration is here
20 | return readq_relaxed(clint_time_val);
| ^
arch/riscv/include/asm/mmio.h:59:56: note: expanded from macro 'readq_relaxed'
59 | #define readq_relaxed(c) ({ u64 __v; __io_rbr(); __v = readq_cpu(c); __io_rar(); __v; })
| ^
arch/riscv/include/asm/mmio.h:32:64: note: expanded from macro 'readq_cpu'
32 | #define readq_cpu(c) ({ u64 __r = le64_to_cpu((__force __le64)__raw_readq(c)); __r; })
| ^
In file included from arch/riscv/kernel/asm-offsets.c:10:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:804:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
804 | insb(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
104 | #define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/asm-offsets.c:10:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:812:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
812 | insw(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
105 | #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/asm-offsets.c:10:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:820:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
820 | insl(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
106 | #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/asm-offsets.c:10:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:829:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
829 | outsb(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
118 | #define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/asm-offsets.c:10:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:838:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
838 | outsw(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
119 | #define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/asm-offsets.c:10:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
vim +/__raw_readq +20 arch/riscv/include/asm/timex.h
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 16
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 17 #ifdef CONFIG_64BIT
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 18 static inline cycles_t get_cycles(void)
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 19 {
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 @20 return readq_relaxed(clint_time_val);
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 21 }
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 22 #else /* !CONFIG_64BIT */
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 23 static inline u32 get_cycles(void)
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 24 {
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 25 return readl_relaxed(((u32 *)clint_time_val));
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 26 }
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 27 #define get_cycles get_cycles
d5be89a8d118a8 Palmer Dabbelt 2020-09-14 28
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2025-05-30 3:22 [PATCH] riscv: use generic MMIO accessors Qingfang Deng
2025-05-31 13:55 ` kernel test robot
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