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Last-minute ACPI and power management fixes for 3.12

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- Revert epoll and select commits related to the freezer, introduced
    during the 3.11 cycle, that cause mysterious user space breakage
    to occur during resume from suspend to RAM for multiple users of
    32-bit x86 systems.  Material for 3.11.y stable kernels.
 
  - Revert a recent ACPI-based PCI hotplug (ACPIPHP) commit that was
    part of boot problem fixes for one machine, but turns out to cause
    issues with hotplug on Thunderbolt chains with multiple devices.
    It also turns out to be unnecessary after another fix in the
    same area that went in later.  From Mika Westerberg.
 
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Merge tag 'pm+acpi-3.12-late' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael J Wysocki:
 "Last-minute ACPI and power management fixes for 3.12

   - Revert epoll and select commits related to the freezer, introduced
     during the 3.11 cycle, that cause mysterious user space breakage to
     occur during resume from suspend to RAM for multiple users of
     32-bit x86 systems.  Material for 3.11.y stable kernels.

   - Revert a recent ACPI-based PCI hotplug (ACPIPHP) commit that was
     part of boot problem fixes for one machine, but turns out to cause
     issues with hotplug on Thunderbolt chains with multiple devices.
     It also turns out to be unnecessary after another fix in the same
     area that went in later.  From Mika Westerberg"

* tag 'pm+acpi-3.12-late' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Revert "ACPI / hotplug / PCI: Avoid doing too much for spurious notifies"
  Revert "select: use freezable blocking call"
  Revert "epoll: use freezable blocking call"
This commit is contained in:
Linus Torvalds 2013-10-31 10:13:28 -07:00
parent 74c85e1357 ab1225901d
commit e7647027bd
3 changed files with 3 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/pci/hotplug/acpiphp_glue.c
View file

@ -552,9 +552,8 @@ static void __ref enable_slot(struct acpiphp_slot *slot)
struct acpiphp_func *func;
int max, pass;
LIST_HEAD(add_list);
int nr_found;
nr_found = acpiphp_rescan_slot(slot);
acpiphp_rescan_slot(slot);
max = acpiphp_max_busnr(bus);
for (pass = 0; pass < 2; pass++) {
list_for_each_entry(dev, &bus->devices, bus_list) {
@ -574,9 +573,6 @@ static void __ref enable_slot(struct acpiphp_slot *slot)
}
}
__pci_bus_assign_resources(bus, &add_list, NULL);
/* Nothing more to do here if there are no new devices on this bus. */
if (!nr_found && (slot->flags & SLOT_ENABLED))
return;
acpiphp_sanitize_bus(bus);
acpiphp_set_hpp_values(bus);

4
fs/eventpoll.c
View file

@ -34,7 +34,6 @@
#include <linux/mutex.h>
#include <linux/anon_inodes.h>
#include <linux/device.h>
#include <linux/freezer.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/mman.h>
@ -1605,8 +1604,7 @@ fetch_events:
}
spin_unlock_irqrestore(&ep->lock, flags);
if (!freezable_schedule_hrtimeout_range(to, slack,
HRTIMER_MODE_ABS))
if (!schedule_hrtimeout_range(to, slack, HRTIMER_MODE_ABS))
timed_out = 1;
spin_lock_irqsave(&ep->lock, flags);

3
fs/select.c
View file

@ -238,8 +238,7 @@ int poll_schedule_timeout(struct poll_wqueues *pwq, int state,
set_current_state(state);
if (!pwq->triggered)
rc = freezable_schedule_hrtimeout_range(expires, slack,
HRTIMER_MODE_ABS);
rc = schedule_hrtimeout_range(expires, slack, HRTIMER_MODE_ABS);
__set_current_state(TASK_RUNNING);
/*