On Thu, Jan 02, 2020 at 06:24:09PM +0100, Amanieu d'Antras wrote:
This is required for clone3 which passes the TLS value through a struct rather than a register.
Signed-off-by: Amanieu d'Antras amanieu@gmail.com Cc: linux-arm-kernel@lists.infradead.org Cc: stable@vger.kernel.org # 5.3.x
Again, looks good to me but I'd like an ack from someone closer to the architecture itself. Acked-by: Christian Brauner christian.brauner@ubuntu.com
arch/arm/Kconfig | 1 + arch/arm/kernel/process.c | 6 +++--- 2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ba75e3661a41..96dab76da3b3 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -72,6 +72,7 @@ config ARM select HAVE_ARM_SMCCC if CPU_V7 select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32 select HAVE_CONTEXT_TRACKING
- select HAVE_COPY_THREAD_TLS select HAVE_C_RECORDMCOUNT select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS if MMU
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index cea1c27c29cb..46e478fb5ea2 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -226,8 +226,8 @@ void release_thread(struct task_struct *dead_task) asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); int -copy_thread(unsigned long clone_flags, unsigned long stack_start,
unsigned long stk_sz, struct task_struct *p)+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); @@ -261,7 +261,7 @@ copy_thread(unsigned long clone_flags, unsigned long stack_start, clear_ptrace_hw_breakpoint(p); if (clone_flags & CLONE_SETTLS)
thread->tp_value[0] = childregs->ARM_r3;
thread->tp_value[0] = tls;thread_notify(THREAD_NOTIFY_COPY, thread); -- 2.24.1