kernel.git/arch/s390/include/asm/thread_info.h, branch linux-3.7.y

sanitize tsk_is_polling()

2012-10-01T13:58:13Z

Make default just return 0. The current default (checking TIF_POLLING_NRFLAG) is taken to architectures that need it; ones that don't do polling in their idle threads don't need to defined TIF_POLLING_NRFLAG at all. ia64 defined both TS_POLLING (used by its tsk_is_polling()) and TIF_POLLING_NRFLAG (not used at all). Killed the latter... Signed-off-by: Al Viro

bury _TIF_RESTORE_SIGMASK

2012-10-01T13:58:12Z

never used... Signed-off-by: Al Viro

s390/comments: unify copyright messages and remove file names

2012-07-20T09:15:04Z

Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens

s390/headers: replace s390x with CONFIG_64BIT where possible

2012-05-24T08:10:10Z

Replace __s390x__ with CONFIG_64BIT in all places that are not exported to userspace or guarded with #ifdef __KERNEL__. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/headers: remove #ifdef KERNEL from not exported headers

2012-05-24T08:10:05Z

Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390: replace TIF_SIE with PF_VCPU

2012-05-16T12:42:39Z

Replace the check for TIF_SIE in the fault handler by a check for PF_VCPU. With the last user of TIF_SIE gone we can now remove the bit. Signed-off-by: Martin Schwidefsky

freezer: remove now unused TIF_FREEZE

2011-11-21T20:32:25Z

Signed-off-by: Tejun Heo Cc: Arnd Bergmann Cc: linux-arch@vger.kernel.org

[S390] add TIF_SYSCALL thread flag

2011-10-30T14:16:43Z

Add an explicit TIF_SYSCALL bit that indicates if a task is inside a system call. The svc_code in the pt_regs structure is now only valid if TIF_SYSCALL is set. With this definition TIF_RESTART_SVC can be replaced with TIF_SYSCALL. Overall do_signal is a bit more readable and it saves a few lines of code. Signed-off-by: Martin Schwidefsky

[S390] signal race with restarting system calls

2011-10-30T14:16:43Z

For a ERESTARTNOHAND/ERESTARTSYS/ERESTARTNOINTR restarting system call do_signal will prepare the restart of the system call with a rewind of the PSW before calling get_signal_to_deliver (where the debugger might take control). For A ERESTART_RESTARTBLOCK restarting system call do_signal will set -EINTR as return code. There are two issues with this approach: 1) strace never sees ERESTARTNOHAND, ERESTARTSYS, ERESTARTNOINTR or ERESTART_RESTARTBLOCK as the rewinding already took place or the return code has been changed to -EINTR 2) if get_signal_to_deliver does not return with a signal to deliver the restart via the repeat of the svc instruction is left in place. This opens a race if another signal is made pending before the system call instruction can be reexecuted. The original system call will be restarted even if the second signal would have ended the system call with -EINTR. These two issues can be solved by dropping the early rewind of the system call before get_signal_to_deliver has been called and by using the TIF_RESTART_SVC magic to do the restart if no signal has to be delivered. The only situation where the system call restart via the repeat of the svc instruction is appropriate is when a SA_RESTART signal is delivered to user space. Unfortunately this breaks inferior calls by the debugger again. The system call number and the length of the system call instruction is lost over the inferior call and user space will see ERESTARTNOHAND/ ERESTARTSYS/ERESTARTNOINTR/ERESTART_RESTARTBLOCK. To correct this a new ptrace interface is added to save/restore the system call number and system call instruction length. Signed-off-by: Martin Schwidefsky

[S390] fix _TIF_SINGLE_STEP definition

2011-10-30T14:16:41Z

_TIF_SINGLE_STEP is incorrectly defined as 1< Signed-off-by: Martin Schwidefsky

kernel.git/arch/s390/include/asm/thread_info.h, branch linux-3.7.y

sanitize tsk_is_polling()

bury _TIF_RESTORE_SIGMASK

s390/comments: unify copyright messages and remove file names

s390/headers: replace __s390x__ with CONFIG_64BIT where possible

s390/headers: remove #ifdef __KERNEL__ from not exported headers

s390: replace TIF_SIE with PF_VCPU

freezer: remove now unused TIF_FREEZE

[S390] add TIF_SYSCALL thread flag

[S390] signal race with restarting system calls

[S390] fix _TIF_SINGLE_STEP definition

s390/headers: replace s390x with CONFIG_64BIT where possible

s390/headers: remove #ifdef KERNEL from not exported headers