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| author | Harvey Hunt <harvey.hunt@imgtec.com> | 2016-05-25 11:06:35 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-28 12:35:11 +0200 |
| commit | aedcfbe06558a9f53002e82d5be64c6c94687726 (patch) | |
| tree | 7dbec9cb94e21a777aa811ddaf836c6d6a0f3c5e /arch/mips/lib/cmpdi2.c | |
| parent | aa76042a016474775ccd187c068669148c30c3bb (diff) | |
| download | linux-aedcfbe06558a9f53002e82d5be64c6c94687726.tar.bz2 | |
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/cmpdi2.c')
| -rw-r--r-- | arch/mips/lib/cmpdi2.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/lib/cmpdi2.c b/arch/mips/lib/cmpdi2.c index 8c1306437ed1..06857da96993 100644 --- a/arch/mips/lib/cmpdi2.c +++ b/arch/mips/lib/cmpdi2.c @@ -2,7 +2,7 @@ #include "libgcc.h" -word_type __cmpdi2(long long a, long long b) +word_type notrace __cmpdi2(long long a, long long b) { const DWunion au = { .ll = a |