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

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Pull x86 asm changes from Ingo Molnar:
 "The biggest changes in this cycle were:

   - Revamp, simplify (and in some cases fix) Time Stamp Counter (TSC)
     primitives.  (Andy Lutomirski)

   - Add new, comprehensible entry and exit handlers written in C.
     (Andy Lutomirski)

   - vm86 mode cleanups and fixes.  (Brian Gerst)

   - 32-bit compat code cleanups.  (Brian Gerst)

  The amount of simplification in low level assembly code is already
  palpable:

     arch/x86/entry/entry_32.S                          | 130 +----
     arch/x86/entry/entry_64.S                          | 197 ++-----

  but more simplifications are planned.

  There's also the usual laudry mix of low level changes - see the
  changelog for details"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (83 commits)
  x86/asm: Drop repeated macro of X86_EFLAGS_AC definition
  x86/asm/msr: Make wrmsrl() a function
  x86/asm/delay: Introduce an MWAITX-based delay with a configurable timer
  x86/asm: Add MONITORX/MWAITX instruction support
  x86/traps: Weaken context tracking entry assertions
  x86/asm/tsc: Add rdtscll() merge helper
  selftests/x86: Add syscall_nt selftest
  selftests/x86: Disable sigreturn_64
  x86/vdso: Emit a GNU hash
  x86/entry: Remove do_notify_resume(), syscall_trace_leave(), and their TIF masks
  x86/entry/32: Migrate to C exit path
  x86/entry/32: Remove 32-bit syscall audit optimizations
  x86/vm86: Rename vm86->v86flags and v86mask
  x86/vm86: Rename vm86->vm86_info to user_vm86
  x86/vm86: Clean up vm86.h includes
  x86/vm86: Move the vm86 IRQ definitions to vm86.h
  x86/vm86: Use the normal pt_regs area for vm86
  x86/vm86: Eliminate 'struct kernel_vm86_struct'
  x86/vm86: Move fields from 'struct kernel_vm86_struct' to 'struct vm86'
  x86/vm86: Move vm86 fields out of 'thread_struct'
  ...
This commit is contained in:
Linus Torvalds
2015-09-01 08:40:25 -07:00
parent 65a99597f0 7e01ebffff
commit 5778077d03
100 changed files with 2196 additions and 1383 deletions
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12
arch/x86/kernel/tsc.c
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@@ -248,7 +248,7 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
data = cyc2ns_write_begin(cpu);
rdtscll(tsc_now);
tsc_now = rdtsc();
ns_now = cycles_2_ns(tsc_now);
/*
@@ -290,7 +290,7 @@ u64 native_sched_clock(void)
}
/* read the Time Stamp Counter: */
rdtscll(tsc_now);
tsc_now = rdtsc();
/* return the value in ns */
return cycles_2_ns(tsc_now);
@@ -316,12 +316,6 @@ unsigned long long
sched_clock(void) __attribute__((alias("native_sched_clock")));
#endif
unsigned long long native_read_tsc(void)
{
return __native_read_tsc();
}
EXPORT_SYMBOL(native_read_tsc);
int check_tsc_unstable(void)
{
return tsc_unstable;
@@ -984,7 +978,7 @@ static struct clocksource clocksource_tsc;
*/
static cycle_t read_tsc(struct clocksource *cs)
{
return (cycle_t)get_cycles();
return (cycle_t)rdtsc_ordered();
}
/*