[PATCH 12/17] microblaze: switch to copy_thread_tls()

[Christian Brauner]

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: Michal Simek <mon...@monstr.eu>
Signed-off-by: Christian Brauner <christian.brau...@ubuntu.com>
---
 arch/microblaze/Kconfig          | 1 +
 arch/microblaze/kernel/process.c | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index d262ac0c8714..e3a211a41880 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -46,6 +46,7 @@ config MICROBLAZE
        select CPU_NO_EFFICIENT_FFS
        select MMU_GATHER_NO_RANGE if MMU
        select SPARSE_IRQ
+       select HAVE_COPY_THREAD_TLS
 
 # Endianness selection
 choice
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 6527ec22f158..c2ca9c326510 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -54,8 +54,8 @@ void flush_thread(void)
 {
 }
 
-int copy_thread(unsigned long clone_flags, unsigned long usp,
-               unsigned long arg, struct task_struct *p)
+int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
+                   unsigned long arg, struct task_struct *p, unsigned long tls)
 {
        struct pt_regs *childregs = task_pt_regs(p);
        struct thread_info *ti = task_thread_info(p);
@@ -114,7 +114,7 @@ int copy_thread(unsigned long clone_flags, unsigned long 
usp,
         *  which contains TLS area
         */
        if (clone_flags & CLONE_SETTLS)
-               childregs->r21 = childregs->r10;
+               childregs->r21 = tls;
 
        return 0;
 }
-- 
2.27.0