arm64: Skip irqflags tracing for NMI in IRQs disabled context

[sfrench/cifs-2.6.git] / arch / arm64 / kernel / perf_callchain.c

diff --git a/arch/arm64/kernel/perf_callchain.c b/arch/arm64/kernel/perf_callchain.c
index 94754f07f67aa29363c3d4e86be560d8b8b1a5d1..61d983f5756f8a94ff449cb53bb99534bbf4ac6b 100644 (file)
--- a/arch/arm64/kernel/perf_callchain.c
+++ b/arch/arm64/kernel/perf_callchain.c
@@ -39,7 +39,7 @@ user_backtrace(struct frame_tail __user *tail,
        unsigned long lr;
 
        /* Also check accessibility of one struct frame_tail beyond */
-       if (!access_ok(VERIFY_READ, tail, sizeof(buftail)))
+       if (!access_ok(tail, sizeof(buftail)))
                return NULL;
 
        pagefault_disable();
@@ -86,7 +86,7 @@ compat_user_backtrace(struct compat_frame_tail __user *tail,
        unsigned long err;
 
        /* Also check accessibility of one struct frame_tail beyond */
-       if (!access_ok(VERIFY_READ, tail, sizeof(buftail)))
+       if (!access_ok(tail, sizeof(buftail)))
                return NULL;
 
        pagefault_disable();
@@ -168,7 +168,7 @@ void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
        frame.fp = regs->regs[29];
        frame.pc = regs->pc;
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
-       frame.graph = current->curr_ret_stack;
+       frame.graph = 0;
 #endif
 
        walk_stackframe(current, &frame, callchain_trace, entry);