- 10 Jun, 2015 3 commits
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Denys Vlasenko authored
We use three MOVs to swap edx and ecx. We can use one XCHG instead. Expand the comments. It's difficult to keep track which arg# every register corresponds to, so spell it out. Signed-off-by:
Denys Vlasenko <dvlasenk@redhat.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Drewry <wad@chromium.org> Link: http://lkml.kernel.org/r/1433876051-26604-3-git-send-email-dvlasenk@redhat.com [ Expanded the comments some more. ] Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Denys Vlasenko authored
Here it is not obvious why we load pt_regs->cx to %esi etc. Lets improve comments. Explain that here we combine two things: first, we reload registers since some of them are clobbered by the C function we just called; and we also convert 32-bit syscall params to 64-bit C ABI, because we are going to jump back to syscall dispatch code. Move reloading of 6th argument into the macro instead of having it after each of two macro invocations. No actual code changes here. Signed-off-by:
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Denys Vlasenko authored
I put %ebp restoration code too late. Under strace, it is not reached and %ebp is not restored upon return to userspace. This is the fix. Run-tested. Signed-off-by:
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- 09 Jun, 2015 1 commit
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Denys Vlasenko authored
A few bits were missed. Signed-off-by:
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- 08 Jun, 2015 8 commits
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Ingo Molnar authored
Brian Gerst noticed that I did a weird rename in the following commit: b2502b41 ("x86/asm/entry: Untangle 'system_call' into two entry points: entry_SYSCALL_64 and entry_INT80_32") which renamed __NR_ia32_syscall_max to __NR_entry_INT80_compat_max. Now the original name was a misnomer, but the new one is a misnomer as well, as all the 32-bit compat syscall entry points (sysenter, syscall) share the system call table, not just the INT80 based one. Rename it to __NR_syscall_compat_max. Reported-by:
Brian Gerst <brgerst@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: 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: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by:
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Denys Vlasenko authored
I broke this recently when I changed pt_regs->r8..r11 clearing logic in INT 80 code path. There is a branch from SYSENTER/SYSCALL code to INT 80 code: if we fail to retrieve arg6, we return EFAULT. Before this patch, in this case we don't clear pt_regs->r8..r11. This patch fixes this. The resulting code is smaller and simpler. While at it, remove incorrect comment about syscall dispatching CALL insn: it does not use RIP-relative addressing form (the comment was meant to be "TODO: make this rip-relative", and morphed since then, dropping "TODO"). Signed-off-by:
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Ingo Molnar authored
Make the 64-bit syscall entry code a bit more readable: - use consistent assembly coding style similar to the other entry_*.S files - remove old comments that are not true anymore - eliminate whitespace noise - use consistent vertical spacing - fix various comments - reorganize entry point generation tables to be more readable No code changed: # arch/x86/entry/entry_64.o: text data bss dec hex filename 12282 0 0 12282 2ffa entry_64.o.before 12282 0 0 12282 2ffa entry_64.o.after md5: cbab1f2d727a2a8a87618eeb79f391b7 entry_64.o.before.asm cbab1f2d727a2a8a87618eeb79f391b7 entry_64.o.after.asm Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
Collect all changes to arch/x86/entry/entry_64.S, before applying patch that changes most of the file. Signed-off-by: -
Ingo Molnar authored
Make the 32-bit syscall entry code a bit more readable: - use consistent assembly coding style similar to entry_64.S - remove old comments that are not true anymore - eliminate whitespace noise - use consistent vertical spacing - fix various comments No code changed: # arch/x86/entry/entry_32.o: text data bss dec hex filename 6025 0 0 6025 1789 entry_32.o.before 6025 0 0 6025 1789 entry_32.o.after md5: f3fa16b2b0dca804f052deb6b30ba6cb entry_32.o.before.asm f3fa16b2b0dca804f052deb6b30ba6cb entry_32.o.after.asm Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
The 'system_call' entry points differ starkly between native 32-bit and 64-bit kernels: on 32-bit kernels it defines the INT 0x80 entry point, while on 64-bit it's the SYSCALL entry point. This is pretty confusing when looking at generic code, and it also obscures the nature of the entry point at the assembly level. So unangle this by splitting the name into its two uses: system_call (32) -> entry_INT80_32 system_call (64) -> entry_SYSCALL_64 As per the generic naming scheme for x86 system call entry points: entry_MNEMONIC_qualifier where 'qualifier' is one of _32, _64 or _compat. Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
x86/asm/entry: Untangle 'ia32_sysenter_target' into two entry points: entry_SYSENTER_32 and entry_SYSENTER_compat So the SYSENTER instruction is pretty quirky and it has different behavior depending on bitness and CPU maker. Yet we create a false sense of coherency by naming it 'ia32_sysenter_target' in both of the cases. Split the name into its two uses: ia32_sysenter_target (32) -> entry_SYSENTER_32 ia32_sysenter_target (64) -> entry_SYSENTER_compat As per the generic naming scheme for x86 system call entry points: entry_MNEMONIC_qualifier where 'qualifier' is one of _32, _64 or _compat. Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
Rename the following system call entry points: ia32_cstar_target -> entry_SYSCALL_compat ia32_syscall -> entry_INT80_compat The generic naming scheme for x86 system call entry points is: entry_MNEMONIC_qualifier where 'qualifier' is one of _32, _64 or _compat. Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by:
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- 07 Jun, 2015 7 commits
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Borislav Petkov authored
This header containing all MSRs and respective bit definitions got exported to userspace in conjunction with the big UAPI shuffle. But, it doesn't belong in the UAPI headers because userspace can do its own MSR defines and exporting them from the kernel blocks us from doing cleanups/renames in that header. Which is ridiculous - it is not kernel's job to export such a header and keep MSRs list and their names stable. Signed-off-by:
Borislav Petkov <bp@suse.de> Acked-by:
H. Peter Anvin <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: David Howells <dhowells@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1433436928-31903-19-git-send-email-bp@alien8.deSigned-off-by:
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Ingo Molnar authored
Conflicts: arch/x86/include/asm/irq_vectors.h Signed-off-by: -
Borislav Petkov authored
In talking to Aravind recently about making certain AMD topology attributes available to the MCE injection module, it seemed like that CONFIG_X86_HT thing is more or less superfluous. It is def_bool y, depends on SMP and gets enabled in the majority of .configs - distro and otherwise - out there. So let's kill it and make code behind it depend directly on SMP. Signed-off-by:
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Ashok Raj authored
Add the necessary changes to do_machine_check() to be able to process MCEs signaled as local MCEs. Typically, only recoverable errors (SRAR type) will be Signaled as LMCE. The architecture does not restrict to only those errors, however. When errors are signaled as LMCE, there is no need for the MCE handler to perform rendezvous with other logical processors unlike earlier processors that would broadcast machine check errors. Signed-off-by:
Ashok Raj <ashok.raj@intel.com> Signed-off-by:
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Ashok Raj authored
Initialize and prepare for handling LMCEs. Add a boot-time option to disable LMCEs. Signed-off-by:
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Ashok Raj authored
Add required definitions to support Local Machine Check Exceptions. Historically, machine check exceptions on Intel x86 processors have been broadcast to all logical processors in the system. Upcoming CPUs will support an opt-in mechanism to request some machine check exceptions be delivered to a single logical processor experiencing the fault. See http://www.intel.com/sdm Volume 3, System Programming Guide, chapter 15 for more information on MSRs and documentation on Local MCE. Signed-off-by:
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Ingo Molnar authored
So we now have the following system entry code related files, which define the following system call instruction and other entry paths: entry_32.S # 32-bit binaries on 32-bit kernels entry_64.S # 64-bit binaries on 64-bit kernels entry_64_compat.S # 32-bit binaries on 64-bit kernels Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Drewry <wad@chromium.org> Cc: linux-kernel@vger.kernel.org Signed-off-by:
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- 05 Jun, 2015 9 commits
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Denys Vlasenko authored
Really swap arguments #4 and #5 in stub32_clone instead of "optimizing" it into a move. Yes, tls_val is currently unused. Yes, on some CPUs XCHG is a little bit more expensive than MOV. But a cycle or two on an expensive syscall like clone() is way below noise floor, and this optimization is simply not worth the obfuscation of logic. [ There's also ongoing work on the clone() ABI by Josh Triplett that will depend on this change later on. ] Signed-off-by:
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Denys Vlasenko authored
The reason for copying of %r8 to %rcx is quite non-obvious. Add a comment which explains why it is done. Signed-off-by:
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Ingo Molnar authored
Make the 64-bit compat 32-bit syscall entry code a bit more readable: - eliminate whitespace noise - use consistent vertical spacing - use consistent assembly coding style similar to entry_64.S - fix various comments No code changed: arch/x86/entry/ia32entry.o: text data bss dec hex filename 1391 0 0 1391 56f ia32entry.o.before 1391 0 0 1391 56f ia32entry.o.after md5: f28501dcc366e68b557313942c6496d6 ia32entry.o.before.asm f28501dcc366e68b557313942c6496d6 ia32entry.o.after.asm Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Denys Vlasenko authored
SYSENTER and SYSCALL 32-bit entry points differ in handling of arg2 and arg6. SYSENTER: * ecx arg2 * ebp user stack * 0(%ebp) arg6 SYSCALL: * ebp arg2 * esp user stack * 0(%esp) arg6 Sysenter code loads 0(%ebp) to %ebp right away. (This destroys %ebp. It means we do not preserve it on return. It's not causing problems since userspace VDSO code does not depend on it, and SYSENTER insn can't be sanely used outside of VDSO). Syscall code loads 0(%ebp) to %r9. This allows to eliminate one MOV insn (r9 is a register where arg6 should be for 64-bit ABI), but on audit/ptrace code paths this requires juggling of r9 and ebp: (1) ptrace expects arg6 to be in pt_regs->bp; (2) r9 is callee-clobbered register and needs to be saved/restored around calls to C functions. This patch changes syscall code to load 0(%ebp) to %ebp, making it more similar to sysenter code. It's a bit smaller: text data bss dec hex filename 1407 0 0 1407 57f ia32entry.o.before 1391 0 0 1391 56f ia32entry.o To preserve ABI compat, we restore ebp on exit. Run-tested. Signed-off-by:
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Denys Vlasenko authored
This macro is small, has only three callsites, and one of them is slightly different using a conditional parameter. A few saved lines aren't worth the resulting obfuscation. Generated machine code is identical. Signed-off-by:
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Denys Vlasenko authored
This macro is small, has only four callsites, and one of them is slightly different using a conditional parameter. A few saved lines aren't worth the resulting obfuscation. Generated machine code is identical. Signed-off-by:
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Denys Vlasenko authored
32-bit syscall entry points do not save the complete pt_regs struct, they leave some fields uninitialized. However, they must be careful to not leak uninitialized data in pt_regs->r8..r11 to ptrace users. CLEAR_RREGS macro is used to zero these fields out when needed. However, in the int80 code path this zeroing is unconditional. This patch simplifies it by storing zeroes there right away, when pt_regs is constructed on stack. This uses shorter instructions: text data bss dec hex filename 1423 0 0 1423 58f ia32entry.o.before 1407 0 0 1407 57f ia32entry.o Compile-tested. Signed-off-by:
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Andy Lutomirski authored
INTERRUPT_RETURN turns into a jmp instruction. There's no need for extra indirection. Signed-off-by:
Andy Lutomirski <luto@kernel.org> Cc: <linux-kernel@vger.kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/2f2318653dbad284a59311f13f08cea71298fd7c.1433449436.git.luto@kernel.orgSigned-off-by:
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Andy Lutomirski authored
The wrmsrl_safe macro performs invalid shifts if the value argument is 32 bits. This makes it unnecessarily awkward to write code that puts an unsigned long into an MSR. Convert it to a real inline function. For inspiration, see: 7c74d5b7 ("x86/asm/entry/64: Fix MSR_IA32_SYSENTER_CS MSR value"). Signed-off-by:
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- 04 Jun, 2015 4 commits
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Ingo Molnar authored
The vsyscall code is entry code too, so move it to arch/x86/entry/vsyscall/. Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
The build time generated syscall definitions are entry code related, move them into the arch/x86/entry/ directory. Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
asm/calling.h is private to the entry code, make this more apparent by moving it to the new arch/x86/entry/ directory. Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
These are all calling x86 entry code functions, so move them close to other entry code. Change lib-y to obj-y: there's no real difference between the two as we don't really drop any of them during the linking stage, and obj-y is the more common approach for core kernel object code. Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by:
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- 03 Jun, 2015 7 commits
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Ingo Molnar authored
Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
Move the ia32entry.S file over into arch/x86/entry/. Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
Create a new directory hierarchy for the low level x86 entry code: arch/x86/entry/* This will host all the low level glue that is currently scattered all across arch/x86/. Start with entry_64.S and entry_32.S. Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: -
Ingo Molnar authored
Peter Zijstra noticed that in arch/x86/Kconfig there are a lot of X86_{32,64} clauses in the X86 symbol, plus there are a number of similar selects in the X86_32 and X86_64 config definitions as well - which all overlap in an inconsistent mess. So: - move all select's from X86_32 and X86_64 to the X64 config option - sort their names, so that duplications are easier to spot - align their if clauses, so that they are easier to identify at a glance - and so that weirdnesses stand out more No change in functionality: 105 insertions(+) 105 deletions(-) Originally-from: Peter Zijlstra <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150602153027.GU3644@twins.programming.kicks-ass.netSigned-off-by: -
Ingo Molnar authored
Signed-off-by: -
Borislav Petkov authored
Remove the line-break in the user-visible string and add the missing space in this error message: WARNING: lockdep init error! lock-(console_sem).lock was acquiredbefore lockdep_init Also: - don't yell, it's just a debug warning - denote references to function calls with '()' - standardize the lock name quoting - and finish the sentence. The result: WARNING: lockdep init error: lock '(console_sem).lock' was acquired before lockdep_init(). Signed-off-by:
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Ingo Molnar authored
Merge branches 'x86/mm', 'x86/build', 'x86/apic' and 'x86/platform' into x86/core, to apply dependent patch Signed-off-by:
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- 02 Jun, 2015 1 commit
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Jan Beulich authored
retint_kernel doesn't require %rcx to be pointing to thread info (anymore?), and the code on the two alternative paths is - not really surprisingly - identical. Signed-off-by:
Jan Beulich <jbeulich@suse.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/556C664F020000780007FB64@mail.emea.novell.comSigned-off-by:
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