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authorShaohua Li <shaohua.li@intel.com>2009-04-07 06:24:29 +0400
committerLen Brown <len.brown@intel.com>2009-04-07 08:02:40 +0400
commit9090589d87506c578ea1523ffd7ae7fd9424fb28 (patch)
tree215163d13dbfa514a4121594cd4c6e27fde9b911 /drivers/acpi/sleep.h
parentd508afb437daee7cf07da085b635c44a4ebf9b38 (diff)
downloadlinux-9090589d87506c578ea1523ffd7ae7fd9424fb28.tar.xz
ACPI: convert acpi_device_lock spinlock to mutex
Convert acpi_device_lock to a mutex to avoid a potential race upon access to /proc/acpi/wakeup Delete the lock entirely in wakeup.c since it is not necessary (and can not sleep) Found-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/sleep.h')
-rw-r--r--drivers/acpi/sleep.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/sleep.h b/drivers/acpi/sleep.h
index cfaf8f5b0a14..8a8f3b3382a6 100644
--- a/drivers/acpi/sleep.h
+++ b/drivers/acpi/sleep.h
@@ -5,3 +5,6 @@ extern int acpi_suspend (u32 state);
extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
extern void acpi_enable_wakeup_device(u8 sleep_state);
extern void acpi_disable_wakeup_device(u8 sleep_state);
+
+extern struct list_head acpi_wakeup_device_list;
+extern struct mutex acpi_device_lock;