diff options
| author | Harvey Hunt <harvey.hunt@imgtec.com> | 2016-05-25 11:06:35 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-07 18:14:32 -0700 |
| commit | 7b74228bb0815412ed2735b379113ee386179766 (patch) | |
| tree | bdbd7e4e4b583cc815e1c6ffd056f30a53da1253 /arch/mips/lib/ashrdi3.c | |
| parent | bfcc040a885bc182ad950cc45b00d0e1367a7284 (diff) | |
MIPS: lib: Mark intrinsics notrace
commit aedcfbe06558a9f53002e82d5be64c6c94687726 upstream.
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>
Patchwork: https://patchwork.linux-mips.org/patch/13354/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/mips/lib/ashrdi3.c')
| -rw-r--r-- | arch/mips/lib/ashrdi3.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/lib/ashrdi3.c b/arch/mips/lib/ashrdi3.c index c884a912b660..9fdf1a598428 100644 --- a/arch/mips/lib/ashrdi3.c +++ b/arch/mips/lib/ashrdi3.c @@ -2,7 +2,7 @@ #include "libgcc.h" -long long __ashrdi3(long long u, word_type b) +long long notrace __ashrdi3(long long u, word_type b) { DWunion uu, w; word_type bm; |