Release 4.14 arch/sh/kernel/process.c
// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>
#include <linux/sched/task_stack.h>
#include <linux/export.h>
#include <linux/stackprotector.h>
#include <asm/fpu.h>
#include <asm/ptrace.h>
struct kmem_cache *task_xstate_cachep = NULL;
unsigned int xstate_size;
#ifdef CONFIG_CC_STACKPROTECTOR
unsigned long __stack_chk_guard __read_mostly;
EXPORT_SYMBOL(__stack_chk_guard);
#endif
/*
* this gets called so that we can store lazy state into memory and copy the
* current task into the new thread.
*/
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
#ifdef CONFIG_SUPERH32
unlazy_fpu(src, task_pt_regs(src));
#endif
*dst = *src;
if (src->thread.xstate) {
dst->thread.xstate = kmem_cache_alloc(task_xstate_cachep,
GFP_KERNEL);
if (!dst->thread.xstate)
return -ENOMEM;
memcpy(dst->thread.xstate, src->thread.xstate, xstate_size);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 77 | 83.70% | 1 | 50.00% |
| Suresh B. Siddha | 15 | 16.30% | 1 | 50.00% |
| Total | 92 | 100.00% | 2 | 100.00% |
void free_thread_xstate(struct task_struct *tsk)
{
if (tsk->thread.xstate) {
kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
tsk->thread.xstate = NULL;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 39 | 100.00% | 1 | 100.00% |
| Total | 39 | 100.00% | 1 | 100.00% |
void arch_release_task_struct(struct task_struct *tsk)
{
free_thread_xstate(tsk);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 13 | 86.67% | 2 | 66.67% |
| Thomas Gleixner | 2 | 13.33% | 1 | 33.33% |
| Total | 15 | 100.00% | 3 | 100.00% |
void arch_task_cache_init(void)
{
if (!xstate_size)
return;
task_xstate_cachep = kmem_cache_create("task_xstate", xstate_size,
__alignof__(union thread_xstate),
SLAB_PANIC | SLAB_NOTRACK, NULL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 34 | 100.00% | 1 | 100.00% |
| Total | 34 | 100.00% | 1 | 100.00% |
#ifdef CONFIG_SH_FPU_EMU
# define HAVE_SOFTFP 1
#else
# define HAVE_SOFTFP 0
#endif
void init_thread_xstate(void)
{
if (boot_cpu_data.flags & CPU_HAS_FPU)
xstate_size = sizeof(struct sh_fpu_hard_struct);
else if (HAVE_SOFTFP)
xstate_size = sizeof(struct sh_fpu_soft_struct);
else
xstate_size = 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 41 | 100.00% | 1 | 100.00% |
| Total | 41 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 241 | 82.82% | 3 | 27.27% |
| Filippo Arcidiacono | 21 | 7.22% | 1 | 9.09% |
| Suresh B. Siddha | 16 | 5.50% | 1 | 9.09% |
| Ingo Molnar | 7 | 2.41% | 3 | 27.27% |
| Tejun Heo | 3 | 1.03% | 1 | 9.09% |
| Thomas Gleixner | 2 | 0.69% | 1 | 9.09% |
| Greg Kroah-Hartman | 1 | 0.34% | 1 | 9.09% |
| Total | 291 | 100.00% | 11 | 100.00% |
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