MIPS: ftrace: Remove pointer comparison to 0 in prepare_ftrace_return

Web:        https://git.kernel.org/torvalds/c/83aa53eb5f34f48e6ff24aee02f879b50c949982
Commit:     83aa53eb5f34f48e6ff24aee02f879b50c949982
Parent:     2e6522c565522a2e18409c315c49d78c8b74807b
Refname:    refs/heads/master
Author:     Mathieu Malaterre <[email protected]>
AuthorDate: Wed Jan 17 12:31:57 2018 +0100
Committer:  James Hogan <[email protected]>
CommitDate: Thu Jan 18 21:59:24 2018 +0000

    MIPS: ftrace: Remove pointer comparison to 0 in prepare_ftrace_return
    
    Replace pointer comparison to 0 with NULL in prepare_ftrace_return
    to improve code readability. Identified with coccinelle script
    'badzero.cocci'.
    
    Signed-off-by: Mathieu Malaterre <[email protected]>
    Reviewed-by: James Hogan <[email protected]>
    Cc: Ralf Baechle <[email protected]>
    Cc: Steven Rostedt <[email protected]>
    Cc: Ingo Molnar <[email protected]>
    Cc: [email protected]
    Patchwork: https://patchwork.linux-mips.org/patch/18494/
    Signed-off-by: James Hogan <[email protected]>
---
 arch/mips/kernel/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c
index 99285be0e088..7f3dfdbc3657 100644
--- a/arch/mips/kernel/ftrace.c
+++ b/arch/mips/kernel/ftrace.c
@@ -361,7 +361,7 @@ void prepare_ftrace_return(unsigned long *parent_ra_addr, unsigned long self_ra,
 	 * If fails when getting the stack address of the non-leaf function's
 	 * ra, stop function graph tracer and return
 	 */
-	if (parent_ra_addr == 0)
+	if (parent_ra_addr == NULL)
 		goto out;
 #endif
 	/* *parent_ra_addr = return_hooker; */
--
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