kernel.git/arch/x86/kernel/process_64.c, branch linux-3.15.y

asmlinkage, x86: Add explicit __visible to arch/x86/*

2014-05-05T23:07:44Z

As requested by Linus add explicit __visible to the asmlinkage users. This marks all functions visible to assembler. Tree sweep for arch/x86/* Signed-off-by: Andi Kleen Link: http://lkml.kernel.org/r/1398984278-29319-3-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-11-14T07:55:56Z

Pull two x86 fixes from Ingo Molnar. * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/microcode/amd: Tone down printk(), don't treat a missing firmware file as an error x86/dumpstack: Fix printk_address for direct addresses

x86: move fpu_counter into ARCH specific thread_struct

2013-11-13T03:09:13Z

Only a couple of arches (sh/x86) use fpu_counter in task_struct so it can be moved out into ARCH specific thread_struct, reducing the size of task_struct for other arches. Compile tested i386_defconfig + gcc 4.7.3 Signed-off-by: Vineet Gupta Acked-by: Ingo Molnar Cc: Paul Mundt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

x86/dumpstack: Fix printk_address for direct addresses

2013-11-12T20:06:06Z

Consider a kernel crash in a module, simulated the following way: static int my_init(void) { char *map = (void *)0x5; *map = 3; return 0; } module_init(my_init); When we turn off FRAME_POINTERs, the very first instruction in that function causes a BUG. The problem is that we print IP in the BUG report using %pB (from printk_address). And %pB decrements the pointer by one to fix printing addresses of functions with tail calls. This was added in commit 71f9e59800e5ad4 ("x86, dumpstack: Use %pB format specifier for stack trace") to fix the call stack printouts. So instead of correct output: BUG: unable to handle kernel NULL pointer dereference at 0000000000000005 IP: [] my_init+0x0/0x10 [pb173] We get: BUG: unable to handle kernel NULL pointer dereference at 0000000000000005 IP: [] 0xffffffffa0151fff To fix that, we use %pS only for stack addresses printouts (via newly added printk_stack_address) and %pB for regs->ip (via printk_address). I.e. we revert to the old behaviour for all except call stacks. And since from all those reliable is 1, we remove that parameter from printk_address. Signed-off-by: Jiri Slaby Cc: Namhyung Kim Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: joe@perches.com Cc: jirislaby@gmail.com Link: http://lkml.kernel.org/r/1382706418-8435-1-git-send-email-jslaby@suse.cz Signed-off-by: Ingo Molnar

sched, x86: Provide a per-cpu preempt_count implementation

2013-09-25T12:07:57Z

Convert x86 to use a per-cpu preemption count. The reason for doing so is that accessing per-cpu variables is a lot cheaper than accessing thread_info variables. We still need to save/restore the actual preemption count due to PREEMPT_ACTIVE so we place the per-cpu __preempt_count variable in the same cache-line as the other hot __switch_to() variables such as current_task. NOTE: this save/restore is required even for !PREEMPT kernels as cond_resched() also relies on preempt_count's PREEMPT_ACTIVE to ignore task_struct::state. Also rename thread_info::preempt_count to ensure nobody is 'accidentally' still poking at it. Suggested-by: Linus Torvalds Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/n/tip-gzn5rfsf8trgjoqx8hyayy3q@git.kernel.org Signed-off-by: Ingo Molnar

x86, asmlinkage: Make several variables used from assembler/linker script visible

2013-08-06T21:20:13Z

Plus one function, load_gs_index(). Signed-off-by: Andi Kleen Link: http://lkml.kernel.org/r/1375740170-7446-10-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin

x86, asmlinkage: Make 32bit/64bit __switch_to visible

2013-08-06T21:18:30Z

This function is called from inline assembler, so has to be visible. Signed-off-by: Andi Kleen Link: http://lkml.kernel.org/r/1375740170-7446-6-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin

Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-07-02T23:25:06Z

Pull x86 debug update from Ingo Molnar: "Misc debuggability improvements: - Optimize the x86 CPU register printout a bit - Expose the tboot TXT log via debugfs - Small do_debug() cleanup" * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tboot: Provide debugfs interfaces to access TXT log x86: Remove weird PTR_ERR() in do_debug x86/debug: Only print out DR registers if they are not power-on defaults

x86, flags: Rename X86_EFLAGS_BIT1 to X86_EFLAGS_FIXED

2013-06-25T23:25:32Z

Bit 1 in the x86 EFLAGS is always set. Name the macro something that actually tries to explain what it is all about, rather than being a tautology. Signed-off-by: H. Peter Anvin Cc: Rusty Russell Cc: Gleb Natapov Cc: Paolo Bonzini Link: http://lkml.kernel.org/n/tip-f10rx5vjjm6tfnt8o1wseb3v@git.kernel.org

x86/debug: Only print out DR registers if they are not power-on defaults

2013-06-19T12:33:59Z

The DR registers are rarely useful when decoding oopses. With screen real estate during oopses at a premium, we can save two lines by only printing out these registers when they are set to something other than they power-on state. Signed-off-by: Dave Jones Acked-by: Borislav Petkov Cc: Linus Torvalds Cc: Andrew Morton Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20130618160911.GA24487@redhat.com Signed-off-by: Ingo Molnar