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an='2' class='oid'>979f11b060c0b35b03b86ae854d6f21a710305d0 (diff)

ACPI / PM: Merge do_suspend_lowlevel() into acpi_save_state_mem()

The function do_suspend_lowlevel() is specific to x86 and defined in assembly code, so it should be called from the x86 low-level suspend code rather than from acpi_suspend_enter(). Merge do_suspend_lowlevel() into the x86's acpi_save_state_mem() and change the name of the latter to acpi_suspend_lowlevel(), so that the function's purpose is better reflected by its name. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

Diffstat (limited to 'arch/ia64/kernel/acpi.c')

6%-- __setcontext | | ktskRun Looking further into the swapcontext function in glibc, it was found that the function always call sigprocmask() without checking if there are changes in the signal mask. A check was added to the __set_current_blocked() function to avoid taking the sighand->siglock spinlock if there is no change in the signal mask. This will prevent unneeded spinlock contention when many threads are trying to call sigprocmask(). With this patch applied, the spinlock contention in sigprocmask() was gone. Link: http://lkml.kernel.org/r/1474979209-11867-1-git-send-email-Waiman.Long@hpe.com Signed-off-by: Waiman Long <Waiman.Long@hpe.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Stas Sergeev <stsp@list.ru> Cc: Scott J Norton <scott.norton@hpe.com> Cc: Douglas Hatch <doug.hatch@hpe.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Diffstat (limited to 'kernel')