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-rw-r--r--arch/x86/kernel/geode_32.c5
-rw-r--r--arch/x86/kernel/process_32.c1
-rw-r--r--arch/x86/kernel/process_64.c1
-rw-r--r--arch/x86/kernel/setup_32.c10
-rw-r--r--arch/x86/kernel/tsc_32.c18
5 files changed, 22 insertions, 13 deletions
diff --git a/arch/x86/kernel/geode_32.c b/arch/x86/kernel/geode_32.c
index e8edd63ab000..9b08e852fd1a 100644
--- a/arch/x86/kernel/geode_32.c
+++ b/arch/x86/kernel/geode_32.c
@@ -166,6 +166,8 @@ int geode_has_vsa2(void)
166 static int has_vsa2 = -1; 166 static int has_vsa2 = -1;
167 167
168 if (has_vsa2 == -1) { 168 if (has_vsa2 == -1) {
169 u16 val;
170
169 /* 171 /*
170 * The VSA has virtual registers that we can query for a 172 * The VSA has virtual registers that we can query for a
171 * signature. 173 * signature.
@@ -173,7 +175,8 @@ int geode_has_vsa2(void)
173 outw(VSA_VR_UNLOCK, VSA_VRC_INDEX); 175 outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
174 outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX); 176 outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
175 177
176 has_vsa2 = (inw(VSA_VRC_DATA) == VSA_SIG); 178 val = inw(VSA_VRC_DATA);
179 has_vsa2 = (val == AMD_VSA_SIG || val == GSW_VSA_SIG);
177 } 180 }
178 181
179 return has_vsa2; 182 return has_vsa2;
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 6d5483356e74..e2db9ac5c61c 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -333,6 +333,7 @@ void flush_thread(void)
333 /* 333 /*
334 * Forget coprocessor state.. 334 * Forget coprocessor state..
335 */ 335 */
336 tsk->fpu_counter = 0;
336 clear_fpu(tsk); 337 clear_fpu(tsk);
337 clear_used_math(); 338 clear_used_math();
338} 339}
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index ac54ff56df80..c6eb5c91e5f6 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -294,6 +294,7 @@ void flush_thread(void)
294 /* 294 /*
295 * Forget coprocessor state.. 295 * Forget coprocessor state..
296 */ 296 */
297 tsk->fpu_counter = 0;
297 clear_fpu(tsk); 298 clear_fpu(tsk);
298 clear_used_math(); 299 clear_used_math();
299} 300}
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 2c5f8b213e86..5a2f8e063887 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -532,10 +532,16 @@ static void __init reserve_crashkernel(void)
532 (unsigned long)(crash_size >> 20), 532 (unsigned long)(crash_size >> 20),
533 (unsigned long)(crash_base >> 20), 533 (unsigned long)(crash_base >> 20),
534 (unsigned long)(total_mem >> 20)); 534 (unsigned long)(total_mem >> 20));
535
536 if (reserve_bootmem(crash_base, crash_size,
537 BOOTMEM_EXCLUSIVE) < 0) {
538 printk(KERN_INFO "crashkernel reservation "
539 "failed - memory is in use\n");
540 return;
541 }
542
535 crashk_res.start = crash_base; 543 crashk_res.start = crash_base;
536 crashk_res.end = crash_base + crash_size - 1; 544 crashk_res.end = crash_base + crash_size - 1;
537 reserve_bootmem(crash_base, crash_size,
538 BOOTMEM_DEFAULT);
539 } else 545 } else
540 printk(KERN_INFO "crashkernel reservation failed - " 546 printk(KERN_INFO "crashkernel reservation failed - "
541 "you have to specify a base address\n"); 547 "you have to specify a base address\n");
diff --git a/arch/x86/kernel/tsc_32.c b/arch/x86/kernel/tsc_32.c
index 068759db63dd..65b70637ad97 100644
--- a/arch/x86/kernel/tsc_32.c
+++ b/arch/x86/kernel/tsc_32.c
@@ -14,7 +14,10 @@
14 14
15#include "mach_timer.h" 15#include "mach_timer.h"
16 16
17static int tsc_disabled; 17/* native_sched_clock() is called before tsc_init(), so
18 we must start with the TSC soft disabled to prevent
19 erroneous rdtsc usage on !cpu_has_tsc processors */
20static int tsc_disabled = -1;
18 21
19/* 22/*
20 * On some systems the TSC frequency does not 23 * On some systems the TSC frequency does not
@@ -402,25 +405,20 @@ void __init tsc_init(void)
402{ 405{
403 int cpu; 406 int cpu;
404 407
405 if (!cpu_has_tsc || tsc_disabled) { 408 if (!cpu_has_tsc || tsc_disabled > 0)
406 /* Disable the TSC in case of !cpu_has_tsc */
407 tsc_disabled = 1;
408 return; 409 return;
409 }
410 410
411 cpu_khz = calculate_cpu_khz(); 411 cpu_khz = calculate_cpu_khz();
412 tsc_khz = cpu_khz; 412 tsc_khz = cpu_khz;
413 413
414 if (!cpu_khz) { 414 if (!cpu_khz) {
415 mark_tsc_unstable("could not calculate TSC khz"); 415 mark_tsc_unstable("could not calculate TSC khz");
416 /*
417 * We need to disable the TSC completely in this case
418 * to prevent sched_clock() from using it.
419 */
420 tsc_disabled = 1;
421 return; 416 return;
422 } 417 }
423 418
419 /* now allow native_sched_clock() to use rdtsc */
420 tsc_disabled = 0;
421
424 printk("Detected %lu.%03lu MHz processor.\n", 422 printk("Detected %lu.%03lu MHz processor.\n",
425 (unsigned long)cpu_khz / 1000, 423 (unsigned long)cpu_khz / 1000,
426 (unsigned long)cpu_khz % 1000); 424 (unsigned long)cpu_khz % 1000);