linux-toradex.git/arch/s390/kernel, branch v2.6.25.17

[S390] incorrect reipl nss name.

2008-03-05T11:37:20+00:00

/sys/firmware/reipl/nss/name contains the nss name when defsys or
savesys command has been executed. If the defsys or savesys command
fails the kernel_nss_name has to be cleared since a reipl on that
nss name won't be possible.

Signed-off-by: Hongjie Yang 
Signed-off-by: Martin Schwidefsky

[S390] Load disabled wait psw if reipl fails.

2008-03-05T11:37:19+00:00

Normally this should not happen, but it's cleaner to do it that way.

Signed-off-by: Michael Holzheu 
Signed-off-by: Martin Schwidefsky

[S390] Get rid of memcpy gcc warning workaround.

2008-03-05T11:37:17+00:00

Compile smp.o with -Wno-nonnull so gcc stops warning about memcpy
being used with a null parameter. Also remove the workaround code
and use a char * cast instead of a void * cast to do computations.

Cc: Bastian Blank 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] idle: Fix machine check handling in idle loop.

2008-03-05T11:37:17+00:00

If a machine check handling is pending when the idle loop is entered
default_idle will be left with timer ticks and virtual timer disabled.
Fix this by "calling" the idle_chain. Also a BUG_ON(!in_interrupt) in
start_hz_timer must be removed since the function now gets called from
non interrupt context as well.

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

[S390] etr: fix compile error on !SMP

2008-02-19T14:29:34+00:00

Since a5fbb6d1064be885d2a6b82f625186753cf74848
"KVM: fix !SMP build error" smp_call_function isn't a define anymore
that folds into nothing but a define that calls up_smp_call_function
with all parameters. Hence we cannot #ifdef out the unused code
anymore...
This seems to be the preferred method, so do this for s390 as well.

arch/s390/kernel/time.c: In function 'etr_sync_clock':
arch/s390/kernel/time.c:825: error: 'clock_sync_cpu_start' undeclared
arch/s390/kernel/time.c:862: error: 'clock_sync_cpu_end' undeclared

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

[S390] Initialize per cpu lowcores on cpu hotplug.

2008-02-19T14:29:33+00:00

Just copy the first 512 read-only bytes of the current cpu lowcore if
a new cpu gets onlined. The rest is zeroed out and must be explicitly
initialized. Current code just copies the entire lowcore and
initializes the needed fields.
This should reveal bugs in future enhancements quite early.
Also when the lowcore of the first cpu is replaced this is now done
atomically (no interrupts, no machine checks).

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

[S390] Make sure enabled wait psw is loaded in default_idle.

2008-02-19T14:29:33+00:00

If both NO_IDLE_HZ and VIRT_TIMER are disabled default_idle won't load
an enabled wait psw and busy loop instead. This is because the
idle_chain is empty and the return value of atomic_notifier_call_chain
will be NOTIFY_DONE, which causes default_idle to return instead of
loading an enabled wait psw.
Fix this by calling __atomic_notifier_call_chain instead and add proper
return value handling.

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

[S390] dynamic page tables.

2008-02-09T17:24:41+00:00

Add support for different number of page table levels dependent
on the highest address used for a process. This will cause a 31 bit
process to use a two level page table instead of the four level page
table that is the default after the pud has been introduced. Likewise
a normal 64 bit process will use three levels instead of four. Only
if a process runs out of the 4 tera bytes which can be addressed with
a three level page table the fourth level is dynamically added. Then
the process can use up to 8 peta byte.

Signed-off-by: Martin Schwidefsky

[S390] Remove a.out header file.

2008-02-09T17:24:39+00:00

Signed-off-by: Martin Schwidefsky

[S390] Wire up new timerfd syscalls.

2008-02-09T17:24:37+00:00

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