sh: 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: Rich Felker <dalias@libc.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: linux-sh@vger.kernel.org
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 9fc2b01..e10118d 100644 (file)
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -70,6 +70,7 @@ config SUPERH
        select ARCH_HIBERNATION_POSSIBLE if MMU
        select SPARSE_IRQ
        select HAVE_STACKPROTECTOR
+       select HAVE_COPY_THREAD_TLS
        help
          The SuperH is a RISC processor targeted for use in embedded systems
          and consumer electronics; it was also used in the Sega Dreamcast

diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 456cc8d..537a82d 100644 (file)
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -115,8 +115,8 @@ EXPORT_SYMBOL(dump_fpu);
 asmlinkage void ret_from_fork(void);
 asmlinkage void ret_from_kernel_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 thread_info *ti = task_thread_info(p);
        struct pt_regs *childregs;
@@ -158,7 +158,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
        ti->addr_limit = USER_DS;
 
        if (clone_flags & CLONE_SETTLS)
-               childregs->gbr = childregs->regs[0];
+               childregs->gbr = tls;
 
        childregs->regs[0] = 0; /* Set return value for child */
        p->thread.pc = (unsigned long) ret_from_fork;