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Vincenzo Frascino cf84512fe7 UPSTREAM: mips: Fix gettimeofday() in the vdso library 
[ Upstream commit 7d2aa4bb90 ]

The libc provides a discovery mechanism for vDSO library and its
symbols. When a symbol is not exposed by the vDSOs the libc falls back
on the system calls.

With the introduction of the unified vDSO library on mips this behavior
is not honored anymore by the kernel in the case of gettimeofday().

The issue has been noticed and reported due to a dhclient failure on the
CI20 board:

root@letux:~# dhclient
../../../../lib/isc/unix/time.c:200: Operation not permitted
root@letux:~#

Restore the original behavior fixing gettimeofday() in the vDSO library.

Reported-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: H. Nikolaus Schaller <hns@goldelico.com> # CI20 with JZ4780
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: mips-creator-ci20-dev@googlegroups.com
Cc: letux-kernel@openphoenux.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 520e3bd3dee4266603b97ad5f5cedb88736a09c5)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 154668398
Change-Id: Idd4277e8fca39eb6c4fbb2bce3b8f229548bf169
2020-04-27 22:51:58 -07:00
arch UPSTREAM: mips: Fix gettimeofday() in the vdso library 2020-04-27 22:51:58 -07:00
block This is the 4.19.116 stable release 2020-04-18 13:33:51 +02:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto UPSTREAM: crypto: skcipher - Introduce crypto_sync_skcipher 2020-03-12 10:46:18 -07:00
Documentation BACKPORT: arm64: Relax Documentation/arm64/tagged-pointers.rst 2020-04-27 22:51:57 -07:00
drivers ANDROID: GKI: power_supply: Add FG_TYPE power-supply property 2020-04-27 17:29:19 +00:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs ANDROID: Incremental fs: Use simple compression in log buffer 2020-04-25 13:34:36 +00:00
include UPSTREAM: timekeeping: Provide a generic update_vsyscall() implementation 2020-04-27 22:51:55 -07:00
init ANDROID: GKI: Enable GENERIC_IRQ_CHIP 2020-04-27 23:06:23 +00:00
ipc This is the 4.19.107 stable release 2020-03-03 07:33:01 +01:00
kernel UPSTREAM: timekeeping: Provide a generic update_vsyscall() implementation 2020-04-27 22:51:55 -07:00
lib UPSTREAM: lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO 2020-04-27 22:51:58 -07:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm ANDROID: GKI: mm: export mm_trace_rss_stat for modules to report RSS changes 2020-04-27 16:27:05 +00:00
net UPSTREAM: cfg80211: save multi-bssid properties 2020-04-23 14:37:15 -07:00
samples FROMGIT: samples/hw_breakpoint: drop use of kallsyms_lookup_name() 2020-03-12 11:18:49 +00:00
scripts BACKPORT: FROMGIT: kbuild: mkcompile_h: Include $LD version in /proc/version 2020-04-09 15:16:12 +00:00
security This is the 4.19.118 stable release 2020-04-23 11:07:54 +02:00
sound This is the 4.19.118 stable release 2020-04-23 11:07:54 +02:00
tools ANDROID: Incremental fs: Use simple compression in log buffer 2020-04-25 13:34:36 +00:00
usr initramfs: restore default compression behavior 2020-04-13 10:44:59 +02:00
virt KVM: Check for a bad hva before dropping into the ghc slow path 2020-03-05 16:42:21 +01:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
abi_gki_aarch64_cuttlefish_whitelist ANDROID: ABI/Whitelist: update for Cuttlefish 2020-02-12 11:11:16 +00:00
abi_gki_aarch64_qcom_whitelist ANDROID: GKI: Update ABI XML representation 2020-04-27 17:10:36 -07:00
abi_gki_aarch64_whitelist ANDROID: GKI: Update ABI XML representation 2020-04-24 23:46:25 +00:00
abi_gki_aarch64.xml ANDROID: GKI: Update ABI XML representation 2020-04-27 17:10:36 -07:00
build.config.aarch64 ANDROID: refactor build.config files to remove duplication 2019-10-22 18:27:12 -07:00
build.config.allmodconfig ANDROID: build.config.allmodconfig: Re-enable XFS_FS 2020-04-17 08:41:31 +00:00
build.config.allmodconfig.aarch64 ANDROID: Add allmodconfig build.configs for x86_64 and aarch64 2019-11-12 20:55:23 +00:00
build.config.allmodconfig.arm ANDROID: Add build.config files for ARM 32-bit 2020-03-16 17:43:55 +00:00
build.config.allmodconfig.x86_64 ANDROID: Add allmodconfig build.configs for x86_64 and aarch64 2019-11-12 20:55:23 +00:00
build.config.arm ANDROID: Add build.config files for ARM 32-bit 2020-03-16 17:43:55 +00:00
build.config.common ANDROID: build.config.common: Add BUILDTOOLS_PREBUILT_BIN 2020-04-16 18:00:31 +00:00
build.config.gki ANDROID: gki: Removed cf modules from gki_defconfig 2020-01-31 16:23:38 -08:00
build.config.gki-debug.aarch64 ANDROID: Add build.config.gki-debug.aarch64 2020-03-16 14:29:13 +00:00
build.config.gki-debug.x86_64 ANDROID: Add build.config.gki-debug.x86_64 2020-03-16 14:29:13 +00:00
build.config.gki.aarch64 ANDROID: Add ABI Whitelist for qcom 2020-02-28 23:45:43 +00:00
build.config.gki.x86_64 ANDROID: refactor build.config files to remove duplication 2019-10-22 18:27:12 -07:00
build.config.x86_64 ANDROID: refactor build.config files to remove duplication 2019-10-22 18:27:12 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS This is the 4.19.107 stable release 2020-03-03 07:33:01 +01:00
Makefile This is the 4.19.118 stable release 2020-04-23 11:07:54 +02:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

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.
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.