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authorChristian Brauner <christian.brauner@ubuntu.com>2020-05-25 00:20:53 +0300
committerChristian Brauner <christian.brauner@ubuntu.com>2020-07-05 00:41:37 +0300
commit1dd966ea63f46b82ae9e367de22e3f8c70450fd5 (patch)
tree3f9a962400eedf9e033901e481e107dee09e5dee /arch/nds32
parentad1bb82c057ecebfdb0b619e023c57b425ef7e7e (diff)
downloadlinux-1dd966ea63f46b82ae9e367de22e3f8c70450fd5.tar.xz
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>
Diffstat (limited to 'arch/nds32')
-rw-r--r--arch/nds32/Kconfig1
-rw-r--r--arch/nds32/kernel/process.c7
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig
index e30298e99e1b..7b6eaca81cce 100644
--- a/arch/nds32/Kconfig
+++ b/arch/nds32/Kconfig
@@ -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.
diff --git a/arch/nds32/kernel/process.c b/arch/nds32/kernel/process.c
index 9712fd474f2c..7dbb1bf64165 100644
--- a/arch/nds32/kernel/process.c
+++ b/arch/nds32/kernel/process.c
@@ -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;