[PATCH 07/32] blackfin: copy_thread(): rename 'topstk' argument to 'kthread_arg'

Alex Dowad
2015-03-13T18:08:52Z

'topstk' is a misnomer: it is not a pointer to the top of a stack. Rather, it is
an argument passed to the main function executed by a new kernel thread.

Signed-off-by: Alex Dowad <alexinbeijing@gmail.com>
---
arch/blackfin/kernel/process.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 4aa5545..81cdd5f 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -109,9 +109,12 @@ asmlinkage int bfin_clone(unsigned long clone_flags, unsigned long newsp)
return do_fork(clone_flags, newsp, 0, NULL, NULL);
}

+/*
+ * Copy architecture-specific thread state
+ */
int
copy_thread(unsigned long clone_flags,
- unsigned long usp, unsigned long topstk,
+ unsigned long usp, unsigned long kthread_arg,
struct task_struct *p)
{
struct pt_regs *childregs;
@@ -120,14 +123,16 @@ copy_thread(unsigned long clone_flags,
childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
v = ((unsigned long *)childregs) - 2;
if (unlikely(p->flags & PF_KTHREAD)) {
+ /* kernel thread */
memset(childregs, 0, sizeof(struct pt_regs));
v[0] = usp;
- v[1] = topstk;
+ v[1] = kthread_arg;
childregs->orig_p0 = -1;
childregs->ipend = 0x8000;
__asm__ __volatile__("%0 = syscfg;":"=da"(childregs->syscfg):);
p->thread.usp = 0;
} else {
+ /* user thread */
*childregs = *current_pt_regs();
childregs->r0 = 0;
p->thread.usp = usp ? : rdusp();
--
2.0.0.GIT