commit 157378f43faad830e4aa3815bde5fa9f9a9f5be6
author Olivier Deprez <olivier.deprez@arm.com> Mon Apr 04 15:47:50 2022 +0200
committer Olivier Deprez <olivier.deprez@arm.com> Mon Apr 04 17:19:45 2022 +0200
tree a6c9afae04d547459872e71460db6f8a454a070c
parent 0e64123141f3854e695eb4924d82b52856691466

Update Linux to v5.10.109

Sourced from [1]

[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz

Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>

arch/arc/kernel/process.c

diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index bfd4cbe..37f724a 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -20,6 +20,8 @@
 #include <linux/elf.h>
 #include <linux/tick.h>
 
+#include <asm/fpu.h>
+
 SYSCALL_DEFINE1(arc_settls, void *, user_tls_data_ptr)
 {
 	task_thread_info(current)->thr_ptr = (unsigned int)user_tls_data_ptr;
@@ -88,10 +90,10 @@
 	if (unlikely(ret != -EFAULT))
 		 goto fail;
 
-	down_read(&current->mm->mmap_sem);
-	ret = fixup_user_fault(current, current->mm, (unsigned long) uaddr,
+	mmap_read_lock(current->mm);
+	ret = fixup_user_fault(current->mm, (unsigned long) uaddr,
 			       FAULT_FLAG_WRITE, NULL);
-	up_read(&current->mm->mmap_sem);
+	mmap_read_unlock(current->mm);
 
 	if (likely(!ret))
 		 goto again;
@@ -114,17 +116,6 @@
 		:"I"(arg)); /* can't be "r" has to be embedded const */
 }
 
-#elif defined(CONFIG_EZNPS_MTM_EXT)	/* ARC700 variant in NPS */
-
-void arch_cpu_idle(void)
-{
-	/* only the calling HW thread needs to sleep */
-	__asm__ __volatile__(
-		".word %0	\n"
-		:
-		:"i"(CTOP_INST_HWSCHD_WFT_IE12));
-}
-
 #else	/* ARC700 */
 
 void arch_cpu_idle(void)
@@ -171,8 +162,9 @@
  * |    user_r25    |
  * ------------------  <===== END of PAGE
  */
-int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
-	unsigned long kthread_arg, struct task_struct *p, unsigned long tls)
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+		unsigned long kthread_arg, struct task_struct *p,
+		unsigned long tls)
 {
 	struct pt_regs *c_regs;        /* child's pt_regs */
 	unsigned long *childksp;       /* to unwind out of __switch_to() */
@@ -263,7 +255,7 @@
 /*
  * Do necessary setup to start up a new user task
  */
-void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp)
+void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp)
 {
 	regs->sp = usp;
 	regs->ret = pc;
@@ -275,9 +267,7 @@
 	 */
 	regs->status32 = STATUS_U_MASK | STATUS_L_MASK | ISA_INIT_STATUS_BITS;
 
-#ifdef CONFIG_EZNPS_MTM_EXT
-	regs->eflags = 0;
-#endif
+	fpu_init_task(regs);
 
 	/* bogus seed values for debugging */
 	regs->lp_start = 0x10;
@@ -291,11 +281,6 @@
 {
 }
 
-int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
-{
-	return 0;
-}
-
 int elf_check_arch(const struct elf32_hdr *x)
 {
 	unsigned int eflags;