kernel.git/arch/s390/kernel/process.c, branch linux-3.19.y

s390/simd: clear vector register pointer on fork/clone

2014-12-08T08:42:35Z

The copy_thread function fails to reset the p->thread.vxrs pointer. This causes the child to use the same vector register save area, causing both data corruptions and multiple frees of the memory for the save area after the tasks sharing the save area terminate. Signed-off-by: Martin Schwidefsky

s390/kprobes: make use of NOKPROBE_SYMBOL()

2014-10-27T12:27:28Z

Use NOKPROBE_SYMBOL() instead of __kprobes annotation. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/idle: consolidate idle functions and definitions

2014-10-09T07:14:03Z

Move the C functions and definitions related to the idle state handling to arch/s390/include/asm/idle.h and arch/s390/kernel/idle.c. The function s390_get_idle_time is renamed to arch_cpu_idle_time and vtime_stop_cpu to enabled_wait. Signed-off-by: Martin Schwidefsky

s390: split TIF bits into CIF, PIF and TIF bits

2014-05-20T06:58:47Z

The oi and ni instructions used in entry[64].S to set and clear bits in the thread-flags are not guaranteed to be atomic in regard to other CPUs. Split the TIF bits into CPU, pt_regs and thread-info specific bits. Updates on the TIF bits are done with atomic instructions, updates on CPU and pt_regs bits are done with non-atomic instructions. Signed-off-by: Martin Schwidefsky

s390/mm: optimize randomize_et_dyn for !PF_RANDOMIZE

2013-12-18T16:36:38Z

Skip the call to brk_rnd() if the PF_RANDOMIZE flag is not set for the process. This avoids the costly get_random_int() call. Modify arch_randomize_brk() as well to make it look like randomize_et_dyn(). Signed-off-by: Martin Schwidefsky

s390: fix save and restore of the floating-point-control register

2013-10-24T15:17:11Z

The FPC_VALID_MASK has been used to check the validity of the value to be loaded into the floating-point-control register. With the introduction of the floating-point extension facility and the decimal-floating-point additional bits have been defined which need to be checked in a non straight forward way. So far these bits have been ignored which can cause an incorrect results for decimal- floating-point operations, e.g. an incorrect rounding mode to be set after signal return. The static check with the FPC_VALID_MASK is replaced with a trial load of the floating-point-control value, see test_fp_ctl. In addition an information leak with the padding word between the floating-point-control word and the floating-point registers in the s390_fp_regs is fixed. Reported-by: Heiko Carstens Reviewed-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/uaccess: always run the kernel in home space

2013-10-24T15:16:57Z

Simplify the uaccess code by removing the user_mode=home option. The kernel will now always run in the home space mode. Signed-off-by: Martin Schwidefsky

s390/time: return with irqs disabled from psw_idle

2013-08-28T07:19:23Z

Modify the psw_idle waiting logic in entry[64].S to return with interrupts disabled. This avoids potential issues with udelay and interrupt loops as interrupts are not reenabled after clock comparator interrupts. Signed-off-by: Martin Schwidefsky

s390: Use generic idle loop

2013-04-08T15:39:27Z

Signed-off-by: Thomas Gleixner Cc: Linus Torvalds Cc: Rusty Russell Cc: Paul McKenney Cc: Peter Zijlstra Reviewed-by: Cc: Srivatsa S. Bhat Cc: Magnus Damm Acked-by: Heiko Carstens Link: http://lkml.kernel.org/r/20130321215235.090816526@linutronix.de Signed-off-by: Thomas Gleixner

flagday: don't pass regs to copy_thread()

2012-11-29T04:43:42Z

Signed-off-by: Al Viro