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3a6ab4bcc5
After an objtool improvement, it's complaining about the CLAC in copy_user_handle_tail(): arch/x86/lib/copy_user_64.o: warning: objtool: .altinstr_replacement+0x12: redundant UACCESS disable arch/x86/lib/copy_user_64.o: warning: objtool: copy_user_handle_tail()+0x6: (alt) arch/x86/lib/copy_user_64.o: warning: objtool: copy_user_handle_tail()+0x2: (alt) arch/x86/lib/copy_user_64.o: warning: objtool: copy_user_handle_tail()+0x0: <=== (func) copy_user_handle_tail() is incorrectly marked as a callable function, so objtool is rightfully concerned about the CLAC with no corresponding STAC. Remove the ELF function annotation. The copy_user_handle_tail() code path is already verified by objtool because it's jumped to by other callable asm code (which does the corresponding STAC). Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/6b6e436774678b4b9873811ff023bd29935bee5b.1563413318.git.jpoimboe@redhat.com |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
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 |
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. 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.