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b926e6f61a
linux/arch/x86
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Andy Lutomirski b926e6f61a x86, traps: Fix ist_enter from userspace 
context_tracking_user_exit() has no effect if in_interrupt() returns true,
so ist_enter() didn't work.  Fix it by calling exception_enter(), and thus
context_tracking_user_exit(), before incrementing the preempt count.

This also adds an assertion that will catch the problem reliably if
CONFIG_PROVE_RCU=y to help prevent the bug from being reintroduced.

Link: http://lkml.kernel.org/r/261ebee6aee55a4724746d0d7024697013c40a08.1422709102.git.luto@amacapital.net
Fixes: 9592747538 x86, traps: Track entry into and exit from IST context
Reported-and-tested-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
2015-02-01 04:02:53 -08:00
..
boot x86, boot: Skip relocs when load address unchanged 2015-01-20 12:37:23 +01:00
configs
crypto crypto: sha-mb - Add avx2_supported check. 2015-01-05 21:35:02 +11:00
ia32 x86: ia32entry.S: fix wrong symbolic constant usage: R11->ARGOFFSET 2015-01-13 14:10:31 -08:00
include This is my accumulated x86 entry work, part 1, for 3.20. The meat 2015-01-28 15:33:26 +01:00
kernel x86, traps: Fix ist_enter from userspace 2015-02-01 04:02:53 -08:00
kvm kvm: x86: drop severity of "generation wraparound" message 2014-12-27 21:52:28 +01:00
lguest x86: Avoid building unused IRQ entry stubs 2014-12-16 14:08:14 +01:00
lib x86: Fix off-by-one in instruction decoder 2015-01-09 11:12:26 +01:00
math-emu
mm x86, mpx: Explicitly disable 32-bit MPX support on 64-bit kernels 2015-01-22 21:11:06 +01:00
net
oprofile
pci x86/xen: Override ACPI IRQ management callback __acpi_unregister_gsi 2015-01-20 11:44:41 +01:00
platform Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 14:02:02 -08:00
power
purgatory
realmode
syscalls x86: hook up execveat system call 2014-12-13 12:42:51 -08:00
tools
um x86, um: actually mark system call tables readonly 2015-01-04 14:21:25 +01:00
vdso x86_64, vdso: Fix the vdso address randomization algorithm 2014-12-20 16:56:57 -08:00
video
xen xen: bug fixes for 3.19-rc4 2015-01-14 08:07:42 +13:00
.gitignore
Kbuild
Kconfig Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 14:02:02 -08:00
Kconfig.cpu
Kconfig.debug
Makefile
Makefile_32.cpu
Makefile.um