From: Amanieu d'Antras Date: Thu, 2 Jan 2020 17:24:11 +0000 (+0100) Subject: riscv: Implement copy_thread_tls X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=20bda4ed62f507ed72e30e817b43c65fdba60be7;p=openwrt%2Fstaging%2Fblogic.git riscv: Implement copy_thread_tls This is required for clone3 which passes the TLS value through a struct rather than a register. Signed-off-by: Amanieu d'Antras Cc: linux-riscv@lists.infradead.org Cc: # 5.3.x Link: https://lore.kernel.org/r/20200102172413.654385-6-amanieu@gmail.com Signed-off-by: Christian Brauner --- diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index a31169b02ec0..fa7dc03459e7 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -65,6 +65,7 @@ config RISCV select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU select HAVE_ARCH_MMAP_RND_BITS if MMU select ARCH_HAS_GCOV_PROFILE_ALL + select HAVE_COPY_THREAD_TLS config ARCH_MMAP_RND_BITS_MIN default 18 if 64BIT diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 95a3031e5c7c..817cf7b0974c 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -99,8 +99,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) return 0; } -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 pt_regs *childregs = task_pt_regs(p); @@ -121,7 +121,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, if (usp) /* User fork */ childregs->sp = usp; if (clone_flags & CLONE_SETTLS) - childregs->tp = childregs->a5; + childregs->tp = tls; childregs->a0 = 0; /* Return value of fork() */ p->thread.ra = (unsigned long)ret_from_fork; }