commit 8b1e1464468a7008b34dfc6a7e6c78717fc6f780
author Linus Walleij <linus.walleij@linaro.org> Sun Jun 29 22:18:44 2025 +0200
committer Linus Walleij <linus.walleij@linaro.org> Sun Jun 29 22:18:44 2025 +0200
tree 1e6645644759a21ba3820c8ce79e3ab61c6f5e38
parent d5db10c9b184fff42b765bf07ae22ff84fd538f7

HACK

arch/arm64/kernel/process.c

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 88e4f79..4df1fb1 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -250,9 +250,9 @@ void show_regs(struct pt_regs *regs)
 
 static void tls_thread_flush(void)
 {
-	if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
-		task_pt_regs(current)->tpidr_el0 = 0;
-	else
+	//if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
+	//current_pt_regs()->tpidr_el0 = 0;
+	//else
 		write_sysreg(0, tpidr_el0);
 	if (system_supports_tpidr2())
 		write_sysreg_s(0, SYS_TPIDR2_EL0);
@@ -266,9 +266,9 @@ static void tls_thread_flush(void)
 		 * with a stale shadow state during context switch.
 		 */
 		barrier();
-		if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
-			task_pt_regs(current)->tpidrro_el0 = 0;
-		else
+		// if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
+			current_pt_regs()->tpidrro_el0 = 0;
+		// else
 			write_sysreg(0, tpidrro_el0);
 	}
 }
@@ -442,6 +442,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 		 * out-of-sync with the saved value.
 		 */
 		*task_user_tls(p) = read_sysreg(tpidr_el0);
+		// *task_user_tls(p) = current_pt_regs()->tpidr_el0;
 
 		if (system_supports_poe())
 			p->thread.por_el0 = read_sysreg_s(SYS_POR_EL0);
@@ -524,9 +525,9 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 
 void tls_preserve_current_state(void)
 {
-	if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
-		*task_user_tls(current) = task_pt_regs(current)->tpidr_el0;
-	else
+	// if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
+	// *task_user_tls(current) = current_pt_regs()->tpidr_el0;
+	// else
 		*task_user_tls(current) = read_sysreg(tpidr_el0);
 	if (system_supports_tpidr2() && !is_compat_task())
 		current->thread.tpidr2_el0 = read_sysreg_s(SYS_TPIDR2_EL0);
@@ -537,20 +538,20 @@ static void tls_thread_switch(struct task_struct *next)
 	tls_preserve_current_state();
 
 	if (is_compat_thread(task_thread_info(next))) {
-		if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
-			task_pt_regs(current)->tpidrro_el0 = next->thread.uw.tp_value;
-		else
+		// if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
+			current_pt_regs()->tpidrro_el0 = next->thread.uw.tp_value;
+		// else
 			write_sysreg(next->thread.uw.tp_value, tpidrro_el0);
 	} else {
-		if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
-			task_pt_regs(current)->tpidrro_el0 = 0;
-		else
+		// if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
+			current_pt_regs()->tpidrro_el0 = 0;
+		// else
 			write_sysreg(0, tpidrro_el0);
 	}
 
-	if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
-		task_pt_regs(current)->tpidr_el0 = *task_user_tls(next);
-	else
+	// if (IS_ENABLED(CONFIG_DYNAMIC_STACK))
+		current_pt_regs()->tpidr_el0 = *task_user_tls(next);
+	// else
 		write_sysreg(*task_user_tls(next), tpidr_el0);
 	if (system_supports_tpidr2())
 		write_sysreg_s(next->thread.tpidr2_el0, SYS_TPIDR2_EL0);