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Helge Deller a089e3fd5a fs/signalfd.c: fix inconsistent return codes for signalfd4
The kernel signalfd4() syscall returns different error codes when called
either in compat or native mode.  This behaviour makes correct emulation
in qemu and testing programs like LTP more complicated.

Fix the code to always return -in both modes- EFAULT for unaccessible user
memory, and EINVAL when called with an invalid signal mask.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Laurent Vivier <laurent@vivier.eu>
Link: http://lkml.kernel.org/r/20200530100707.GA10159@ls3530.fritz.box
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-12 10:58:01 -07:00
arch alpha: fix annotation of io{read,write}{16,32}be() 2020-08-12 10:57:59 -07:00
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drivers uaccess: add force_uaccess_{begin,end} helpers 2020-08-12 10:57:59 -07:00
fs fs/signalfd.c: fix inconsistent return codes for signalfd4 2020-08-12 10:58:01 -07:00
include autofs: fix doubled word 2020-08-12 10:58:00 -07:00
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kernel kernel: add a kernel_wait helper 2020-08-12 10:57:59 -07:00
lib lib/test_bits.c: add tests of GENMASK 2020-08-12 10:58:00 -07:00
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mm uaccess: add force_uaccess_{begin,end} helpers 2020-08-12 10:57:59 -07:00
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Makefile ./Makefile: add debug option to enable function aligned on 32 bytes 2020-08-12 10:57:59 -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.