openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

nds32: switch to copy_thread_tls() 

Use the copy_thread_tls() calling convention which passes tls through a
register. This is required so we can remove the copy_thread{_tls}() split
and remove the HAVE_COPY_THREAD_TLS macro.

Cc: Greentime Hu <green.hu@gmail.com>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2020-05-24 23:20:53 +02:00
parent ad1bb82c05
commit 1dd966ea63
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
2 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/nds32/Kconfig
View File

@ -48,6 +48,7 @@ config NDS32
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_DYNAMIC_FTRACE
select HAVE_COPY_THREAD_TLS
help
Andes(nds32) Linux support.

7
arch/nds32/kernel/process.c
View File

@ -149,8 +149,9 @@ void flush_thread(void)
DEFINE_PER_CPU(struct task_struct *, __entry_task);
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
int copy_thread(unsigned long clone_flags, unsigned long stack_start,
unsigned long stk_sz, struct task_struct *p)
int copy_thread_tls(unsigned long clone_flags, unsigned long stack_start,
unsigned long stk_sz, struct task_struct *p,
unsigned long tls)
{
struct pt_regs *childregs = task_pt_regs(p);
@ -170,7 +171,7 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start,
childregs->uregs[0] = 0;
childregs->osp = 0;
if (clone_flags & CLONE_SETTLS)
childregs->uregs[25] = childregs->uregs[3];
childregs->uregs[25] = tls;
}
/* cpu context switching */
p->thread.cpu_context.pc = (unsigned long)ret_from_fork;