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Josh Poimboeuf 3a6ab4bcc5 x86/uaccess: Remove ELF function annotation from copy_user_handle_tail()
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
2019-07-18 21:01:05 +02:00
arch x86/uaccess: Remove ELF function annotation from copy_user_handle_tail() 2019-07-18 21:01:05 +02:00
block docs conversion for v5.3-rc1 2019-07-16 12:21:41 -07:00
certs Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs" 2019-07-10 18:43:43 -07:00
crypto USB / PHY patches for 5.3-rc1 2019-07-11 15:40:06 -07:00
Documentation hwspinlock updates for v5.3 2019-07-17 11:53:53 -07:00
drivers hwspinlock updates for v5.3 2019-07-17 11:53:53 -07:00
fs Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
include Merge branch 'x86/debug' into core/urgent 2019-07-18 20:50:48 +02:00
init Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
ipc ipc/mqueue.c: only perform resource calculation if user valid 2019-07-16 19:23:24 -07:00
kernel Merge branch 'x86/debug' into core/urgent 2019-07-18 20:50:48 +02:00
lib Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
LICENSES
mm Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
net pci-v5.3-changes 2019-07-15 20:44:49 -07:00
samples VFIO updates for v5.3-rc1 2019-07-17 11:23:13 -07:00
scripts Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
security docs conversion for v5.3-rc1 2019-07-16 12:21:41 -07:00
sound kernel: fix typos and some coding style in comments 2019-07-16 19:23:21 -07:00
tools Merge branch 'x86/debug' into core/urgent 2019-07-18 20:50:48 +02:00
usr docs: early-userspace: move to driver-api guide 2019-07-15 11:03:01 -03:00
virt ARM: 2019-07-12 15:35:14 -07:00
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.cocciconfig
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.mailmap MAINTAINERS: Update my email address 2019-06-18 14:37:27 +01:00
COPYING
CREDITS docs: admin-guide: move sysctl directory to it 2019-07-15 11:03:01 -03:00
Kbuild
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS remoteproc updates for v5.3 2019-07-17 11:44:41 -07:00
Makefile Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
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.