linux-toradex.git/arch/s390/include/asm/rwsem.h, branch v4.4.97

s390: remove 31 bit support

2015-03-25T10:49:33+00:00

Remove the 31 bit support in order to reduce maintenance cost and
effectively remove dead code. Since a couple of years there is no
distribution left that comes with a 31 bit kernel.

The 31 bit kernel also has been broken since more than a year before
anybody noticed. In addition I added a removal warning to the kernel
shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning
message") which let everybody know about the plan to remove 31 bit
code. We didn't get any response.

Given that the last 31 bit only machine was introduced in 1999 let's
remove the code.
Anybody with 31 bit user space code can still use the compat mode.

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

s390/comments: unify copyright messages and remove file names

2012-07-20T09:15:04+00:00

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

2012-05-24T08:10:10+00:00

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

2012-05-24T08:10:05+00:00

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

rwsem: Move duplicate function prototypes to linux/rwsem.h

2011-01-27T11:30:39+00:00

All architecture specific rwsem headers carry the same function
prototypes. Just x86 adds asmregparm, which is an empty define on all
other architectures. S390 has a stale rwsem_downgrade_write()
prototype.

Remove the duplicates and add the prototypes to linux/rwsem.h

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: David Howells 
Cc: Benjamin Herrenschmidt 
Cc: Richard Henderson 
Acked-by: Tony Luck 
Acked-by: Heiko Carstens 
Cc: Paul Mundt 
Acked-by: David Miller 
Cc: Chris Zankel 
LKML-Reference: <20110126195833.970840140@linutronix.de>
Signed-off-by: Thomas Gleixner

rwsem: Unify the duplicate rwsem_is_locked() inlines

2011-01-27T11:30:39+00:00

Instead of having the same implementation in each architecture, move
it to linux/rwsem.h and remove the duplicates. It's unlikely that an
arch will ever implement something different, but we can deal with
that when it happens.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: David Howells 
Cc: Benjamin Herrenschmidt 
Cc: Matt Turner 
Acked-by: Tony Luck 
Acked-by: Heiko Carstens 
Cc: Paul Mundt 
Acked-by: David Miller 
Cc: Chris Zankel 
LKML-Reference: <20110126195833.876773757@linutronix.de>
Signed-off-by: Thomas Gleixner

rwsem: Move duplicate init macros and functions to linux/rwsem.h

2011-01-27T11:30:39+00:00

The rwsem initializers and related macros and functions are mostly the
same. Some of them lack the lockdep initializer, but having it in
place does not matter for architectures which do not support lockdep.

powerpc, sparc, x86: No functional change

sh, s390: Removes the duplicate init_rwsem (inline and #define)

alpha, ia64, xtensa: Use the lockdep capable init function in
       	     	     lib/rwsem.c which is just uninlining the init
       	     	     function for the LOCKDEP=n case

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: David Howells 
Cc: Benjamin Herrenschmidt 
Cc: Matt Turner 
Acked-by: Tony Luck 
Acked-by: Heiko Carstens 
Cc: Paul Mundt 
Acked-by: David Miller 
Cc: Chris Zankel 
LKML-Reference: <20110126195833.771812729@linutronix.de>

rwsem: Move duplicate struct rwsem declaration to linux/rwsem.h

2011-01-27T11:30:39+00:00

The difference between these declarations is the data type of the
count member and the lack of lockdep in some architectures/

long is equivivalent to signed long and the #ifdef guarded dep_map
member does not hurt anyone.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: David Howells 
Cc: Benjamin Herrenschmidt 
Cc: Matt Turner 
Acked-by: Tony Luck 
Acked-by: Heiko Carstens 
Cc: Paul Mundt 
Acked-by: David Miller 
Cc: Chris Zankel 
LKML-Reference: <20110126195833.679641914@linutronix.de>
Signed-off-by: Thomas Gleixner

rwsem: Cleanup includes

2011-01-27T11:30:38+00:00

All rwsem implementations include the same headers. Include them from
include/linux/rwsem.h

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: David Howells 
Cc: Benjamin Herrenschmidt 
Cc: Matt Turner 
Acked-by: Tony Luck 
Acked-by: Heiko Carstens 
Cc: Paul Mundt 
Acked-by: David Miller 
Cc: Chris Zankel 
LKML-Reference: <20110126195833.483520950@linutronix.de>

[S390] use inline assembly contraints available with gcc 3.3.3

2010-02-26T21:37:30+00:00

Drop support to compile the kernel with gcc versions older than 3.3.3.
This allows us to use the "Q" inline assembly contraint on some more
inline assemblies without duplicating a lot of complex code (e.g. __xchg
and __cmpxchg). The distinction for older gcc versions can be removed
which saves a few lines and simplifies the code.

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

linux-toradex.git/arch/s390/include/asm/rwsem.h, branch v4.4.97

s390: remove 31 bit support

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

rwsem: Move duplicate function prototypes to linux/rwsem.h

rwsem: Unify the duplicate rwsem_is_locked() inlines

rwsem: Move duplicate init macros and functions to linux/rwsem.h

rwsem: Move duplicate struct rwsem declaration to linux/rwsem.h

rwsem: Cleanup includes

[S390] use inline assembly contraints available with gcc 3.3.3

s390/headers: replace s390x with CONFIG_64BIT where possible

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