add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/arch/s390/kernel/stacktrace.c
..
..
@@ -6,70 +6,62 @@
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  *  Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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  */
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-#include <linux/sched.h>
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-#include <linux/sched/debug.h>
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 #include <linux/stacktrace.h>
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-#include <linux/kallsyms.h>
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-#include <linux/export.h>
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+#include <asm/stacktrace.h>
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+#include <asm/unwind.h>
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+#include <asm/kprobes.h>
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-static int __save_address(void *data, unsigned long address, int nosched)
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+void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
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+		     struct task_struct *task, struct pt_regs *regs)
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 {
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-	struct stack_trace *trace = data;
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+	struct unwind_state state;
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+	unsigned long addr;
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-	if (nosched && in_sched_functions(address))
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-		return 0;
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-	if (trace->skip > 0) {
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-		trace->skip--;
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-		return 0;
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+	unwind_for_each_frame(&state, task, regs, 0) {
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+		addr = unwind_get_return_address(&state);
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+		if (!addr || !consume_entry(cookie, addr))
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+			break;
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 	}
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-	if (trace->nr_entries < trace->max_entries) {
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-		trace->entries[trace->nr_entries++] = address;
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-		return 0;
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+}
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+
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+/*
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+ * This function returns an error if it detects any unreliable features of the
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+ * stack.  Otherwise it guarantees that the stack trace is reliable.
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+ *
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+ * If the task is not 'current', the caller *must* ensure the task is inactive.
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+ */
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+int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry,
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+			     void *cookie, struct task_struct *task)
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+{
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+	struct unwind_state state;
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+	unsigned long addr;
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+
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+	unwind_for_each_frame(&state, task, NULL, 0) {
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+		if (state.stack_info.type != STACK_TYPE_TASK)
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+			return -EINVAL;
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+
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+		if (state.regs)
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+			return -EINVAL;
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+
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+		addr = unwind_get_return_address(&state);
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+		if (!addr)
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+			return -EINVAL;
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+
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+#ifdef CONFIG_KPROBES
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+		/*
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+		 * Mark stacktraces with kretprobed functions on them
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+		 * as unreliable.
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+		 */
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+		if (state.ip == (unsigned long)kretprobe_trampoline)
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+			return -EINVAL;
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+#endif
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+
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+		if (!consume_entry(cookie, addr))
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+			return -EINVAL;
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 	}
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-	return 1;
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+
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+	/* Check for stack corruption */
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+	if (unwind_error(&state))
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+		return -EINVAL;
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+	return 0;
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 }
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-
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-static int save_address(void *data, unsigned long address, int reliable)
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-{
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-	return __save_address(data, address, 0);
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-}
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-
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-static int save_address_nosched(void *data, unsigned long address, int reliable)
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-{
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-	return __save_address(data, address, 1);
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-}
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-
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-void save_stack_trace(struct stack_trace *trace)
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-{
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-	unsigned long sp;
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-
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-	sp = current_stack_pointer();
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-	dump_trace(save_address, trace, NULL, sp);
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-	if (trace->nr_entries < trace->max_entries)
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-		trace->entries[trace->nr_entries++] = ULONG_MAX;
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-}
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-EXPORT_SYMBOL_GPL(save_stack_trace);
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-
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-void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
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-{
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-	unsigned long sp;
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-
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-	sp = tsk->thread.ksp;
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-	if (tsk == current)
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-		sp = current_stack_pointer();
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-	dump_trace(save_address_nosched, trace, tsk, sp);
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-	if (trace->nr_entries < trace->max_entries)
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-		trace->entries[trace->nr_entries++] = ULONG_MAX;
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-}
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-EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
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-
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-void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
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-{
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-	unsigned long sp;
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-
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-	sp = kernel_stack_pointer(regs);
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-	dump_trace(save_address, trace, NULL, sp);
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-	if (trace->nr_entries < trace->max_entries)
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-		trace->entries[trace->nr_entries++] = ULONG_MAX;
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-}
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-EXPORT_SYMBOL_GPL(save_stack_trace_regs);