[jimc:dd-drm-next 3/16] lib/dynamic_debug.c:786:53: warning: format specifies type 'unsigned int' but the argument has type 'size_t' (aka 'unsigned long')
9:34 p.m.
tree: https://github.com/jimc/linux.git dd-drm-next
head: bf8f0832d11f09c546179ca6a2c5432706ea3d32
commit: 221a341c10ebb8545beac6ee3937859d26ddcc60 [3/16] dyndbg: rationalize verbosity
config: riscv-buildonly-randconfig-r005-20210913 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project
261cbe98c38f8c1ee1a482fe76511110e790f58a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://github.com/jimc/linux/commit/221a341c10ebb8545beac6ee3937859d26dd...
git remote add jimc https://github.com/jimc/linux.git
git fetch --no-tags jimc dd-drm-next
git checkout 221a341c10ebb8545beac6ee3937859d26ddcc60
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
In file included from lib/dynamic_debug.c:35:
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:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro
'__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from lib/dynamic_debug.c:35:
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:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro
'__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from lib/dynamic_debug.c:35:
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:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
> lib/dynamic_debug.c:786:53: warning: format specifies type
'unsigned int' but the argument has type 'size_t' (aka 'unsigned
long') [-Wformat]
v2pr_info("read %u bytes from userspace
<\n%s>\n", len, tmpbuf);
~~ ^~~
%lu
lib/dynamic_debug.c:120:49: note: expanded from macro 'v2pr_info'
#define v2pr_info(fmt, ...) vnpr_info(2, fmt, ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
lib/dynamic_debug.c:116:18: note: expanded from macro 'vnpr_info'
pr_info(fmt, ##__VA_ARGS__); \
~~~ ^~~~~~~~~~~
include/linux/printk.h:420:34: note: expanded from macro 'pr_info'
printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
8 warnings generated.
vim +786 lib/dynamic_debug.c
765
766 /*
767 * File_ops->write method for <debugfs>/dynamic_debug/control. Gathers
the
768 * command text from userspace, parses and executes it.
769 */
770 #define USER_BUF_PAGE 4096
771 static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
772 size_t len, loff_t *offp)
773 {
774 char *tmpbuf;
775 int ret;
776
777 if (len == 0)
778 return 0;
779 if (len > USER_BUF_PAGE - 1) {
780 pr_warn("expected <%d bytes into control\n", USER_BUF_PAGE);
781 return -E2BIG;
782 }
783 tmpbuf = memdup_user_nul(ubuf, len);
784 if (IS_ERR(tmpbuf))
785 return PTR_ERR(tmpbuf);
786 v2pr_info("read %u bytes from userspace
<\n%s>\n", len, tmpbuf);
787
788 ret = ddebug_exec_queries(tmpbuf, NULL);
789 kfree(tmpbuf);
790 if (ret < 0)
791 return ret;
792
793 *offp += len;
794 return len;
795 }
796
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0-DAY CI Kernel Test Service, Intel Corporation
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