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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-04-13 02:16:26 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-04-13 02:16:26 +0400 |
commit | ccb1ec95e924a24906ef01ce6d028a8dc13dc87d (patch) | |
tree | b16a02083ba6843fe3f2513f74a72c95d43ddccb /drivers | |
parent | 4a1d7544fee5e601a4e642ce2720689f90428d65 (diff) | |
parent | d48fc63f6f3f485ed5aa9cf019d8e8e3a7d10263 (diff) | |
download | linux-ccb1ec95e924a24906ef01ce6d028a8dc13dc87d.tar.xz |
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"The itimer removal one is not strictly a fix, but I really wanted to
avoid a rebase of the urgent ones."
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Revert "clocksource: Load the ACPI PM clocksource asynchronously"
clockevents: tTack broadcast device mode change in tick_broadcast_switch_to_oneshot()
itimer: Use printk_once instead of WARN_ONCE
nohz: Fix stale jiffies update in tick_nohz_restart()
tick: Document TICK_ONESHOT config option
proc: stats: Use arch_idle_time for idle and iowait times if available
itimer: Schedule silent NULL pointer fixup in setitimer() for removal
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clocksource/acpi_pm.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c index 82e882028fcf..6b5cf02c35c8 100644 --- a/drivers/clocksource/acpi_pm.c +++ b/drivers/clocksource/acpi_pm.c @@ -23,7 +23,6 @@ #include <linux/init.h> #include <linux/pci.h> #include <linux/delay.h> -#include <linux/async.h> #include <asm/io.h> /* @@ -180,15 +179,17 @@ static int verify_pmtmr_rate(void) /* Number of reads we try to get two different values */ #define ACPI_PM_READ_CHECKS 10000 -static void __init acpi_pm_clocksource_async(void *unused, async_cookie_t cookie) +static int __init init_acpi_pm_clocksource(void) { cycle_t value1, value2; unsigned int i, j = 0; + if (!pmtmr_ioport) + return -ENODEV; /* "verify" this timing source: */ for (j = 0; j < ACPI_PM_MONOTONICITY_CHECKS; j++) { - usleep_range(100 * j, 100 * j + 100); + udelay(100 * j); value1 = clocksource_acpi_pm.read(&clocksource_acpi_pm); for (i = 0; i < ACPI_PM_READ_CHECKS; i++) { value2 = clocksource_acpi_pm.read(&clocksource_acpi_pm); @@ -202,34 +203,25 @@ static void __init acpi_pm_clocksource_async(void *unused, async_cookie_t cookie " 0x%#llx, 0x%#llx - aborting.\n", value1, value2); pmtmr_ioport = 0; - return; + return -EINVAL; } if (i == ACPI_PM_READ_CHECKS) { printk(KERN_INFO "PM-Timer failed consistency check " " (0x%#llx) - aborting.\n", value1); pmtmr_ioport = 0; - return; + return -ENODEV; } } if (verify_pmtmr_rate() != 0){ pmtmr_ioport = 0; - return; + return -ENODEV; } - clocksource_register_hz(&clocksource_acpi_pm, + return clocksource_register_hz(&clocksource_acpi_pm, PMTMR_TICKS_PER_SEC); } -static int __init init_acpi_pm_clocksource(void) -{ - if (!pmtmr_ioport) - return -ENODEV; - - async_schedule(acpi_pm_clocksource_async, NULL); - return 0; -} - /* We use fs_initcall because we want the PCI fixups to have run * but we still need to load before device_initcall */ |