linux_dsm_epyc7002/arch/x86
Andy Lutomirski 1e3fbb8a1d x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimization
'ret_from_fork' checks TIF_IA32 to determine whether 'pt_regs' and
the related state make sense for 'ret_from_sys_call'.  This is
entirely the wrong check.  TS_COMPAT would make a little more
sense, but there's really no point in keeping this optimization
at all.

This fixes a return to the wrong user CS if we came from int
0x80 in a 64-bit task.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/4710be56d76ef994ddf59087aad98c000fbab9a4.1424989793.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-04 22:50:53 +01:00
..
boot Linux 4.0-rc2 2015-03-04 06:35:43 +01:00
configs x86/kconfig/defconfig: Enable CONFIG_FHANDLE=y 2014-12-08 12:04:17 +01:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-02-14 09:47:01 -08:00
ia32 x86/asm/entry/64/compat: Use more readable constant 2015-03-04 22:50:52 +01:00
include x86/asm/entry/64: Simplify optimistic SYSRET 2015-03-04 22:50:52 +01:00
kernel x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimization 2015-03-04 22:50:53 +01:00
kvm Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-16 14:58:12 -08:00
lguest lguest: update help text. 2015-02-19 14:44:32 +10:30
lib x86/asm: Introduce push/pop macros which generate CFI_REL_OFFSET and CFI_RESTORE 2015-03-04 22:50:49 +01:00
math-emu
mm Linux 4.0-rc2 2015-03-04 06:35:43 +01:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-12-10 15:48:20 -05:00
oprofile
pci ACPI and power management updates for v3.20-rc1 2015-02-10 15:09:41 -08:00
platform Merge branch 'linus' into x86/urgent, to merge dependent patch 2015-02-28 08:03:10 +01:00
power x86: Store a per-cpu shadow copy of CR4 2015-02-04 12:10:42 +01:00
purgatory Merge branches 'x86-build-for-linus', 'x86-cleanups-for-linus' and 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 12:35:46 -08:00
realmode Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-16 14:58:12 -08:00
syscalls x86/compat: Remove sys32_vm86_warning 2015-03-04 06:16:21 +01:00
tools x86, build: replace Perl script with Shell script 2015-01-26 13:37:18 -08:00
um x86/asm: Use alternative_2() in rdtsc_barrier() 2015-02-23 13:44:17 +01:00
vdso x86_64: add KASan support 2015-02-13 21:21:41 -08:00
video
xen x86/xen: Initialize cr4 shadow for 64-bit PV(H) guests 2015-02-23 16:30:26 +00:00
.gitignore x86/build: Add arch/x86/purgatory/ make generated files to gitignore 2014-10-09 09:29:46 +02:00
Kbuild
Kconfig Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-21 11:12:07 -08:00
Kconfig.cpu
Kconfig.debug x86/intel/quark: Add Isolated Memory Regions for Quark X1000 2015-02-18 23:22:47 +01:00
Makefile x86/raid6: correctly check for assembler capabilities 2015-02-04 08:35:51 +11:00
Makefile_32.cpu
Makefile.um kbuild: do not add $(call ...) to invoke cc-version or cc-fullversion 2015-01-09 17:25:44 +01:00