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sh: switch to copy_thread_tls()

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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 <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: [email protected]
Signed-off-by: Christian Brauner <[email protected]>
Signed-off-by: Rich Felker <[email protected]>
This commit is contained in:
Christian Brauner authored and Rich Felker committed 2020-08-14 22:05:18 -04:00
1 parent 6dfdf673cc
commit e1cc9d8d59
2 files changed
+4 -3
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arch/sh/Kconfig
+1
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@@ -29,6 +29,7 @@ config SUPERH
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_KGDB
select HAVE_ARCH_TRACEHOOK
select HAVE_COPY_THREAD_TLS
select HAVE_DEBUG_BUGVERBOSE
select HAVE_DEBUG_KMEMLEAK
select HAVE_DYNAMIC_FTRACE
arch/sh/kernel/process_32.c
+3 -3
View File
@@ -111,8 +111,8 @@ 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;
@@ -154,7 +154,7 @@ 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;