kernel.git/arch/s390/kernel/head64.S, branch linux-2.6.37.y

[S390] correct address of _stext with CONFIG_SHARED_KERNEL=y

2010-05-12T07:32:26Z

As of git commit 1844c9bc0b2fed3023551c1affe033ab38e90b9a head64.S/head31.S are not included in head.S anymore but build as an extra object. This breaks shared kernel support because the .org statement in head64.S/head31.S for CONFIG_SHARED_KERNEL=y will have a different effect. The end address of the head.text section in head.o will be added to the .org value, to compensate for this subtract 0x11000 to get the required value of 0x100000 again. Signed-off-by: Martin Schwidefsky

[S390] fix boot failures with compressed kernels

2010-03-24T10:49:54Z

Fix two bugs with the kernel image compression: 1) reset the bss section of the compressed vmlinux 2) clear the high half of the registers for 64 bit early enough for the decompression step Signed-off-by: Martin Schwidefsky

[S390] add support for compressed kernels

2010-02-26T21:37:33Z

Add the "bzImage" compile target and the necessary code to generate compressed kernel images. The old style uncompressed "image" target is preserved, a simple make will build them both. Signed-off-by: Martin Schwidefsky

[S390] zfcpdump: remove cross arch dump support

2010-02-26T21:37:30Z

Remove support to be able to dump 31 bit systems with a 64 bit dumper. This is mostly useless since no distro ships 31 bit kernels together with a 64 bit dumper. We also get rid of a bit of hacky code. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

[S390] s390: clear high-order bits of registers after sam64

2009-12-07T11:45:10Z

When the kernel is IPLed without the CLEAR option and switches to 64-bit, the high-order half of the registers might contain random values. This can cause addressing exceptions and the kernel enters an interrupt loop. Initialize the high-order half of the general purpose registers with zeros after switching to 64-bit mode. Cc: Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

[S390] Limit cpu detection to 256 physical cpus.

2009-09-11T08:29:55Z

Saves us more than 65k pointless IPIs. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

[S390] Initialize __LC_THREAD_INFO early.

2009-09-11T08:29:53Z

"lockdep: Fix backtraces" reveales a bug in early setup code: when lockdep tries to save a stack backtrace before setup_arch has been called the lowcore pointer for the current thread info pointer isn't initialized yet. However our save stack backtrace code relies on it. If the pointer isn't initialized the saved backtrace will have zero entries. lockdep however relies (correctly) on the fact that that cannot happen. A write access to some random memory region is the result. Fix this by initializing the thread info pointer early. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

[S390] eliminate ipl_device from lowcore

2009-03-26T14:24:27Z

Signed-off-by: Martin Schwidefsky

[PATCH] fast vdso implementation for CLOCK_THREAD_CPUTIME_ID

2008-12-31T14:11:49Z

The extract cpu time instruction (ectg) instruction allows the user process to get the current thread cputime without calling into the kernel. The code that uses the instruction needs to switch to the access registers mode to get access to the per-cpu info page that contains the two base values that are needed to calculate the current cputime from the CPU timer with the ectg instruction. Signed-off-by: Martin Schwidefsky

[S390] Remove initial kernel stack backchain initialization.

2008-12-25T12:39:13Z

Early init code clears the backchain of the initial kernel stack frame. This is not necessary since it is pre initialized with zeros. Plus it was broken on 64 bit since it cleared only four of eight bytes. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky