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Colin Cross 237ec6f2e5 ARM: 7486/1: sched_clock: update epoch_cyc on resume 
Many clocks that are used to provide sched_clock will reset during
suspend.  If read_sched_clock returns 0 after suspend, sched_clock will
appear to jump forward.  This patch resets cd.epoch_cyc to the current
value of read_sched_clock during resume, which causes sched_clock() just
after suspend to return the same value as sched_clock() just before
suspend.

In addition, during the window where epoch_ns has been updated before
suspend, but epoch_cyc has not been updated after suspend, it is unknown
whether the clock has reset or not, and sched_clock() could return a
bogus value.  Add a suspended flag, and return the pre-suspend epoch_ns
value during this period.

The new behavior is triggered by calling setup_sched_clock_needs_suspend
instead of setup_sched_clock.

Signed-off-by: Colin Cross <ccross@android.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-08-11 09:15:58 +01:00
..
.gitignore
arch_timer.c Merge branches 'audit', 'delay', 'fixes', 'misc' and 'sta2x11' into for-linus 2012-07-27 23:06:32 +01:00
armksyms.c Merge branches 'audit', 'delay', 'fixes', 'misc' and 'sta2x11' into for-linus 2012-07-27 23:06:32 +01:00
arthur.c
asm-offsets.c
atags.c
atags.h
bios32.c Merge branch 'topic/sebastian-devinit-fixups' into next 2012-06-18 12:14:10 -06:00
calls.S
compat.c
compat.h
cpuidle.c cpuidle: Add common time keeping and irq enabling 2012-03-21 01:59:40 -04:00
crash_dump.c
debug.S ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
devtree.c
dma-isa.c
dma.c
early_printk.c
elf.c Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
entry-armv.S ARM: Fix undefined instruction exception handling 2012-07-31 12:04:30 +01:00
entry-common.S ARM: 7475/1: sys_trace: allow all syscall arguments to be updated via ptrace 2012-07-28 11:11:53 +01:00
entry-header.S
etm.c
fiq.c ARM: fiq: change FIQ_START to a variable 2012-07-01 21:59:19 +08:00
fiqasm.S
ftrace.c ARM: 7468/1: ftrace: Trace function entry before updating index 2012-07-31 10:30:42 +01:00
head-common.S
head-nommu.S ARM: move CP15 definitions to separate header file 2012-03-28 18:30:01 +01:00
head.S ARM: 7439/1: head.S: simplify initial page table mapping 2012-07-09 17:39:39 +01:00
hw_breakpoint.c Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
insn.c ARM: fix missing bug.h include in arch/arm/kernel/insn.c 2012-03-30 11:51:46 +01:00
insn.h ARM: 7334/1: add jump label support 2012-03-24 09:38:56 +00:00
io.c
irq.c ARM: at91: aic can use fast eoi handler type 2012-07-02 14:26:57 +02:00
isa.c
iwmmxt.S
jump_label.c ARM: 7334/1: add jump label support 2012-03-24 09:38:56 +00:00
kgdb.c
kprobes-arm.c
kprobes-common.c Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
kprobes-test-arm.c ARM: 7440/1: kprobes: only test 'sub pc, pc, #1b-2b+8-2' on ARMv6 2012-07-05 12:57:16 +01:00
kprobes-test-thumb.c
kprobes-test.c ARM: 7209/1: Use generic ARM instruction set condition code checks for kprobes. 2011-12-13 08:52:03 +00:00
kprobes-test.h
kprobes-thumb.c ARM: 7423/1: kprobes: run t32_simulate_ldr_literal() without insn slot 2012-06-14 15:11:44 +01:00
kprobes.c Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-04-02 08:53:24 -07:00
kprobes.h
leds.c arm: leds: convert sysdev_class to a regular subsystem 2011-12-21 15:52:57 -08:00
machine_kexec.c Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
Makefile Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-05-21 19:43:57 -07:00
module.c
opcodes.c ARM: 7206/1: Add generic ARM instruction set condition code checks. 2011-12-13 08:52:02 +00:00
patch.c ARM: 7332/1: extract out code patch function from kprobes 2012-03-24 09:38:55 +00:00
patch.h ARM: 7332/1: extract out code patch function from kprobes 2012-03-24 09:38:55 +00:00
perf_event.c Merge branches 'audit', 'delay', 'fixes', 'misc' and 'sta2x11' into for-linus 2012-07-27 23:06:32 +01:00
perf_event_v6.c ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration 2012-07-09 17:41:10 +01:00
perf_event_v7.c ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration 2012-07-09 17:41:10 +01:00
perf_event_xscale.c ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration 2012-07-09 17:41:10 +01:00
pj4-cp0.c
pmu.c
process.c ARM: 7466/1: disable interrupt before spinning endlessly 2012-07-31 10:30:31 +01:00
ptrace.c ARM: 7474/1: get rid of TIF_SYSCALL_RESTARTSYS 2012-07-28 11:11:52 +01:00
relocate_kernel.S
return_address.c
sched_clock.c ARM: 7486/1: sched_clock: update epoch_cyc on resume 2012-08-11 09:15:58 +01:00
setup.c ARM: 7465/1: Handle >4GB memory sizes in device tree and mem=size@start option 2012-07-29 22:19:14 +01:00
signal.c ARM: 7474/1: get rid of TIF_SYSCALL_RESTARTSYS 2012-07-28 11:11:52 +01:00
signal.h ARM: 7471/1: Revert "7442/1: Revert "remove unused restart trampoline"" 2012-07-28 11:11:51 +01:00
sleep.S Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
smp.c ARM: 7480/1: only call smp_send_stop() on SMP 2012-07-31 10:30:44 +01:00
smp_scu.c ARM: 7347/1: SCU: use cpu_logical_map for per-CPU low power mode 2012-04-28 17:31:37 +01:00
smp_tlb.c smp: introduce a generic on_each_cpu_mask() function 2012-03-28 17:14:35 -07:00
smp_twd.c Revert "ARM: 7359/2: smp_twd: Only wait for reprogramming on active cpus" 2012-04-19 19:35:10 +01:00
stacktrace.c
suspend.c ARM: suspend: use idmap_pgd instead of suspend_pgd 2011-12-06 14:04:14 +00:00
swp_emulate.c ARM: 7208/1: Add condition code checking to SWP emulation handler. 2011-12-13 08:52:03 +00:00
sys_arm.c ARM: 7410/1: Add extra clobber registers for assembly in kernel_execve 2012-05-05 13:54:01 +01:00
sys_oabi-compat.c userns: Convert stat to return values mapped from kuids and kgids 2012-05-15 14:08:35 -07:00
tcm.c Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
tcm.h
thumbee.c ARM: 7385/1: ThumbEE: Use cpuid macros to read ID_PFR0 for ThumbEE 2012-04-25 19:49:26 +01:00
time.c ARM: 7413/1: move read_{boot,persistent}_clock to the architecture level 2012-05-06 11:09:21 +01:00
topology.c ARM: 7482/1: topology: fix section mismatch warning for init_cpu_topology 2012-08-11 09:15:56 +01:00
traps.c Merge branch 'audit' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:35:37 -07:00
unwind.c ARM: unwinder: fix bisection to find origin in .idx section 2011-12-15 14:02:19 -08:00
vmlinux.lds.S ARM: 7428/1: Prevent KALLSYM size mismatch on ARM. 2012-06-22 22:54:18 +01:00
xscale-cp0.c