mirror of https://gitee.com/openkylin/linux.git
db4667a800
Some users of get_user use the macro with an argument p which
is already specified as static. When using clang this leads to
a duplicate specifier:
CC arch/arm/kernel/process.o
In file included from init/do_mounts.c:15:
In file included from ./include/linux/tty.h:7:
In file included from ./include/uapi/linux/termios.h:6:
In file included from ./arch/arm/include/generated/uapi/asm/termios.h:1:
./include/asm-generic/termios.h:25:6: warning: duplicate 'const' declaration
specifier [-Wduplicate-decl-specifier]
if (get_user(tmp, &termio->c_iflag) < 0)
^
./arch/arm/include/asm/uaccess.h:195:3: note: expanded from macro 'get_user'
__get_user_check(x, p);
^
./arch/arm/include/asm/uaccess.h:155:12: note: expanded from macro
'__get_user_check'
register const typeof(*(p)) __user *__p asm("r0") = (p);
Remove the const attribute from the register declaration
to avoid the duplicate const specifier. In a test with ptrace.c
and traps.c (both using get_user with non-const arguments for p)
the generated code was exactly the same.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.