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| author | Ingo Molnar <mingo@kernel.org> | 2014-01-25 09:16:14 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-01-25 09:16:14 +0100 |
| commit | 2b45e0f9f34f718725e093f4e335600811d7105a (patch) | |
| tree | 3c6d594539eb16fc955906da65b9fa7aacbc9145 /arch/s390/kernel/ptrace.c | |
| parent | arch/x86/mm/srat: Skip NUMA_NO_NODE while parsing SLIT (diff) | |
| parent | Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel... (diff) | |
| download | linux-2b45e0f9f34f718725e093f4e335600811d7105a.tar.xz linux-2b45e0f9f34f718725e093f4e335600811d7105a.zip | |
Merge branch 'linus' into x86/urgent
Merge in the x86 changes to apply a fix.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/s390/kernel/ptrace.c')
| -rw-r--r-- | arch/s390/kernel/ptrace.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index e65c91c591e8..f6be6087a0e9 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -56,25 +56,26 @@ void update_cr_regs(struct task_struct *task) #ifdef CONFIG_64BIT /* Take care of the enable/disable of transactional execution. */ if (MACHINE_HAS_TE) { - unsigned long cr[3], cr_new[3]; + unsigned long cr, cr_new; - __ctl_store(cr, 0, 2); - cr_new[1] = cr[1]; + __ctl_store(cr, 0, 0); /* Set or clear transaction execution TXC bit 8. */ + cr_new = cr | (1UL << 55); if (task->thread.per_flags & PER_FLAG_NO_TE) - cr_new[0] = cr[0] & ~(1UL << 55); - else - cr_new[0] = cr[0] | (1UL << 55); + cr_new &= ~(1UL << 55); + if (cr_new != cr) + __ctl_load(cr, 0, 0); /* Set or clear transaction execution TDC bits 62 and 63. */ - cr_new[2] = cr[2] & ~3UL; + __ctl_store(cr, 2, 2); + cr_new = cr & ~3UL; if (task->thread.per_flags & PER_FLAG_TE_ABORT_RAND) { if (task->thread.per_flags & PER_FLAG_TE_ABORT_RAND_TEND) - cr_new[2] |= 1UL; + cr_new |= 1UL; else - cr_new[2] |= 2UL; + cr_new |= 2UL; } - if (memcmp(&cr_new, &cr, sizeof(cr))) - __ctl_load(cr_new, 0, 2); + if (cr_new != cr) + __ctl_load(cr_new, 2, 2); } #endif /* Copy user specified PER registers */ @@ -107,15 +108,11 @@ void update_cr_regs(struct task_struct *task) void user_enable_single_step(struct task_struct *task) { set_tsk_thread_flag(task, TIF_SINGLE_STEP); - if (task == current) - update_cr_regs(task); } void user_disable_single_step(struct task_struct *task) { clear_tsk_thread_flag(task, TIF_SINGLE_STEP); - if (task == current) - update_cr_regs(task); } /* |