unicore: 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: Guan Xuetao <gxt@pku.edu.cn>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 11ba183..01451cf 100644 (file)
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -22,6 +22,7 @@ config UNICORE32
        select MODULES_USE_ELF_REL
        select NEED_DMA_MAP_STATE
        select MMU_GATHER_NO_RANGE if MMU
+       select HAVE_COPY_THREAD_TLS
        help
          UniCore-32 is 32-bit Instruction Set Architecture,
          including a series of low-power-consumption RISC chip

diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c
index b4fd3a6..49a3055 100644 (file)
--- a/arch/unicore32/kernel/process.c
+++ b/arch/unicore32/kernel/process.c
@@ -219,9 +219,9 @@ void release_thread(struct task_struct *dead_task)
 asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
 asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread");
 
-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 thread_info *thread = task_thread_info(p);
        struct pt_regs *childregs = task_pt_regs(p);
@@ -241,7 +241,7 @@ copy_thread(unsigned long clone_flags, unsigned long stack_start,
                        childregs->UCreg_sp = stack_start;
 
                if (clone_flags & CLONE_SETTLS)
-                       childregs->UCreg_16 = childregs->UCreg_03;
+                       childregs->UCreg_16 = tls;
        }
        return 0;
 }