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authorHarvey Hunt <harvey.hunt@imgtec.com>2016-05-25 11:06:35 +0100
committerRalf Baechle <ralf@linux-mips.org>2016-05-28 12:35:11 +0200
commitaedcfbe06558a9f53002e82d5be64c6c94687726 (patch)
tree7dbec9cb94e21a777aa811ddaf836c6d6a0f3c5e /arch/mips/lib/lshrdi3.c
parentaa76042a016474775ccd187c068669148c30c3bb (diff)
MIPS: lib: Mark intrinsics notrace
On certain MIPS32 devices, the ftrace tracer "function_graph" uses __lshrdi3() during the capturing of trace data. ftrace then attempts to trace __lshrdi3() which leads to infinite recursion and a stack overflow. Fix this by marking __lshrdi3() as notrace. Mark the other compiler intrinsics as notrace in case the compiler decides to use them in the ftrace path. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: <linux-mips@linux-mips.org> Cc: <linux-kernel@vger.kernel.org> Cc: <stable@vger.kernel.org> # 4.2.x- Patchwork: https://patchwork.linux-mips.org/patch/13354/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib/lshrdi3.c')
-rw-r--r--arch/mips/lib/lshrdi3.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/lib/lshrdi3.c b/arch/mips/lib/lshrdi3.c
index dcf8d6810b7c..364547449c65 100644
--- a/arch/mips/lib/lshrdi3.c
+++ b/arch/mips/lib/lshrdi3.c
@@ -2,7 +2,7 @@
#include "libgcc.h"
-long long __lshrdi3(long long u, word_type b)
+long long notrace __lshrdi3(long long u, word_type b)
{
DWunion uu, w;
word_type bm;