linux/include
Souptick Joarder d97baf9470 include/linux/mm.h: add new inline function vmf_error()
Many places in drivers/ file systems, error was handled in a common way
like below:

	ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;

vmf_error() will replace this and return vm_fault_t type err.

A lot of drivers and filesystems currently have a rather complex mapping
of errno-to-VM_FAULT code.  We have been able to eliminate a lot of it
by just returning VM_FAULT codes directly from functions which are
called exclusively from the fault handling path.

Some functions can be called both from the fault handler and other
context which are expecting an errno, so they have to continue to return
an errno.  Some users still need to choose different behaviour for
different errnos, but vmf_error() captures the essential error
translation that's common to all users, and those that need to handle
additional errors can handle them first.

Link: http://lkml.kernel.org/r/20180510174826.GA14268@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-05-18 17:17:12 -07:00
..
acpi xen: fixes for 4.17-rc1 2018-04-12 11:04:35 -07:00
asm-generic earlycon: Use a pointer table to fix __earlycon_table stride 2018-04-23 10:06:59 +02:00
clocksource ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
crypto
drm drm: Fix HDCP downstream dev count read 2018-04-16 12:10:48 -04:00
dt-bindings Merge branch 'clk-stm32mp1' into clk-fixes 2018-04-16 08:58:39 -07:00
keys
kvm KVM: arm/arm64: vgic: Fix source vcpu issues for GICv2 SGI 2018-04-27 12:39:09 +01:00
linux include/linux/mm.h: add new inline function vmf_error() 2018-05-18 17:17:12 -07:00
math-emu
media MAINTAINERS & files: Canonize the e-mails I use at files 2018-05-04 06:21:06 -04:00
memory
misc
net bonding: send learning packets for vlans on slave 2018-05-11 11:50:41 -04:00
pcmcia
ras
rdma Merge candidates for 4.17 merge window 2018-04-06 17:35:43 -07:00
scsi scsi: core: remove reference to scsi_show_extd_sense() 2018-04-18 23:37:39 -04:00
soc soc: bcm2835: Make !RASPBERRYPI_FIRMWARE dummies return failure 2018-04-16 15:15:23 -07:00
sound ALSA: control: Hardening for potential Spectre v1 2018-04-25 10:37:46 +02:00
target
trace Some of the ftrace internal events use a zero for a data size of 2018-05-16 16:45:23 -07:00
uapi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-05-11 14:14:46 -07:00
video
xen xen/sndif: Sync up with the canonical definition in Xen 2018-04-17 08:26:33 -04:00