Bruno Meneguele bc885f1ab6 doc:kmsg: explicitly state the return value in case of SEEK_CUR ... The commit 625d344978 ("Revert "kernel/printk: add kmsg SEEK_CUR handling"") reverted a change done to the return value in case a SEEK_CUR operation was performed for kmsg buffer based on the fact that different userspace apps were handling the new return value (-ESPIPE) in different ways, breaking them. At the same time -ESPIPE was the wrong decision because kmsg /does support/ seek() but doesn't follow the "normal" behavior userspace is used to. Because of that and also considering the time -EINVAL has been used, it was decided to keep this way to avoid more userspace breakage. This patch adds an official statement to the kmsg documentation pointing to the current return value for SEEK_CUR, -EINVAL, thus userspace libraries and apps can refer to it for a definitive guide on what to expect. Signed-off-by: Bruno Meneguele <bmeneg@redhat.com> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20200710174423.10480-1-bmeneg@redhat.com		2020-07-13 15:07:45 +02:00
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ABI	doc:kmsg: explicitly state the return value in case of SEEK_CUR	2020-07-13 15:07:45 +02:00
PCI	pci-v5.8-changes	2020-06-06 11:01:58 -07:00
RCU	…
accounting	…
admin-guide	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
arm	docs: dt: convert ABI.txt to ReST format	2020-05-04 17:09:52 -05:00
arm64	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
block	for-5.8-tag	2020-06-02 19:59:25 -07:00
bpf	docs/bpf: Add BPF ring buffer design notes	2020-06-01 14:38:22 -07:00
cdrom	…
core-api	Replace HTTP links with HTTPS ones: vsprintf	2020-07-03 14:07:00 +02:00
cpu-freq	…
crypto	…
dev-tools	kcsan: Update Documentation to change supported compilers	2020-06-11 20:04:02 +02:00
devicetree	dt-bindings: Remove redundant 'maxItems'	2020-06-12 09:54:16 -06:00
doc-guide	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
driver-api	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
fault-injection	…
fb	media updates for v5.8-rc1	2020-06-03 20:59:38 -07:00
features	mm/debug: add tests validating architecture page table helpers	2020-06-04 19:06:21 -07:00
filesystems	Highlights:	2020-06-11 10:33:13 -07:00
firmware-guide	usb: typec: Add firmware documentation for the Intel PMC mux control	2020-05-13 14:20:49 +02:00
firmware_class	…
fpga	…
gpu	Merge tag 'drm-intel-next-2020-05-15' of git://anongit.freedesktop.org/drm/drm-intel into drm-next	2020-05-20 13:36:45 +10:00
hid	…
hwmon	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
i2c	…
ia64	docs: add IRQ documentation at the core-api book	2020-05-15 12:00:56 -06:00
ide	…
iio	docs: filesystems: convert configfs.txt to ReST	2020-05-05 09:23:25 -06:00
infiniband	RDMA/core: Remove FMR device ops	2020-06-02 20:32:54 -03:00
input	…
isdn	…
kbuild	kbuild: doc: rename LDFLAGS to KBUILD_LDFLAGS	2020-06-06 23:39:20 +09:00
kernel-hacking	…
leds	…
livepatch	livepatch: Remove .klp.arch	2020-05-08 00:12:42 +02:00
locking	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
m68k	…
maintainer	Documentation: fixes to the maintainer-entry-profile template	2020-06-01 09:36:07 -06:00
mhi	…
mips	…
misc-devices	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
netlabel	…
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
nios2	…
nvdimm	nvdimm: fixes to maintainter-entry-profile	2020-05-25 10:19:19 -06:00
openrisc	…
parisc	…
pcmcia	…
power	Power management updates for 5.8-rc1	2020-06-02 13:17:23 -07:00
powerpc	powerpc updates for 5.8	2020-06-05 12:39:30 -07:00
process	Merge branch 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux	2020-06-10 14:46:54 -07:00
riscv	…
s390	s390 updates for the 5.8 merge window	2020-06-08 12:05:31 -07:00
scheduler	…
scsi	…
security	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
sh	…
sound	…
sparc	…
sphinx	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
sphinx-static	…
spi	…
target	…
timers	timer: add fsleep for flexible sleeping	2020-05-06 17:03:34 -07:00
trace	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
translations	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
usb	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
userspace-api	powerpc updates for 5.8	2020-06-05 12:39:30 -07:00
virt	ARM:	2020-06-03 15:13:47 -07:00
vm	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
w1	w1_therm: adding bulk read support to trigger multiple conversion on bus	2020-05-15 16:29:00 +02:00
watchdog	watchdog: clarify that stop() is optional	2020-05-25 08:55:42 +02:00
x86	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
xtensa	…
.gitignore	…
COPYING-logo	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
Changes	…
CodingStyle	…
Kconfig	…
Makefile	media updates for v5.8-rc1	2020-06-03 20:59:38 -07:00
SubmittingPatches	…
asm-annotations.rst	…
atomic_bitops.txt	…
atomic_t.txt	…
bus-virt-phys-mapping.txt	…
conf.py	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
crc32.txt	…
docutils.conf	…
dontdiff	modpost: generate vmlinux.symvers and reuse it for the second modpost	2020-06-06 23:38:12 +09:00
index.rst	Devicetree updates for v5.8:	2020-06-04 20:11:25 -07:00
kprobes.txt	…
logo.gif	…
lzo.txt	lib/lzo: fix ambiguous encoding bug in lzo-rle	2020-06-11 18:17:47 -07:00
mailbox.txt	…
memory-barriers.txt	…
nommu-mmap.txt	…
remoteproc.txt	…
rpmsg.txt	…
speculation.txt	…
static-keys.txt	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
tee.txt	…
this_cpu_ops.txt	…
xz.txt	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00