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sparc: unconditionally enable HAVE_COPY_THREAD_TLS

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Now that both sparc and sparc64 support copy_thread_tls() and don't rely
on do_fork() anymore, turn on HAVE_COPY_THREAD_TLS unconditionally. Once
all architectures are switched over this macro will be removed and
the old do_fork() calling convention fully abandoned in favor of the
cleaner struct kernel_clone_args one.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Guo Ren <guoren@kernel.org>
Cc: linux-csky@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Link: https://lore.kernel.org/r/20200512171527.570109-4-christian.brauner@ubuntu.com
This commit is contained in:
Christian Brauner 2020-05-12 19:15:27 +02:00
parent a4261d4bb4
commit 7694f5143b
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
2 changed files with 5 additions and 4 deletions
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2
arch/sparc/Kconfig
View File

@ -48,6 +48,7 @@ config SPARC
select LOCKDEP_SMALL if LOCKDEP
select NEED_DMA_MAP_STATE
select NEED_SG_DMA_LENGTH
select HAVE_COPY_THREAD_TLS
config SPARC32
def_bool !64BIT
@ -94,7 +95,6 @@ config SPARC64
select ARCH_HAS_PTE_SPECIAL
select PCI_DOMAINS if PCI
select ARCH_HAS_GIGANTIC_PAGE
select HAVE_COPY_THREAD_TLS
config ARCH_PROC_KCORE_TEXT
def_bool y

7
arch/sparc/kernel/process_32.c
View File

@ -273,8 +273,9 @@ clone_stackframe(struct sparc_stackf __user *dst,
extern void ret_from_fork(void);
extern void ret_from_kernel_thread(void);
int copy_thread(unsigned long clone_flags, unsigned long sp,
unsigned long arg, struct task_struct *p)
int copy_thread_tls(unsigned long clone_flags, unsigned long sp,
unsigned long arg, struct task_struct *p,
unsigned long tls)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs, *regs = current_pt_regs();
@ -376,7 +377,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
regs->u_regs[UREG_I1] = 0;
if (clone_flags & CLONE_SETTLS)
childregs->u_regs[UREG_G7] = regs->u_regs[UREG_I3];
childregs->u_regs[UREG_G7] = tls;
return 0;
}