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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 | |
| parent | aa76042a016474775ccd187c068669148c30c3bb (diff) | |
| download | linux-stable-aedcfbe06558a9f53002e82d5be64c6c94687726.tar.gz linux-stable-aedcfbe06558a9f53002e82d5be64c6c94687726.tar.bz2 linux-stable-aedcfbe06558a9f53002e82d5be64c6c94687726.zip | |
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')
| -rw-r--r-- | arch/mips/lib/ashldi3.c | 2 | ||||
| -rw-r--r-- | arch/mips/lib/ashrdi3.c | 2 | ||||
| -rw-r--r-- | arch/mips/lib/bswapdi.c | 2 | ||||
| -rw-r--r-- | arch/mips/lib/bswapsi.c | 2 | ||||
| -rw-r--r-- | arch/mips/lib/cmpdi2.c | 2 | ||||
| -rw-r--r-- | arch/mips/lib/lshrdi3.c | 2 | ||||
| -rw-r--r-- | arch/mips/lib/ucmpdi2.c | 2 |
7 files changed, 7 insertions, 7 deletions
diff --git a/arch/mips/lib/ashldi3.c b/arch/mips/lib/ashldi3.c index beb80f316095..927dc94a030f 100644 --- a/arch/mips/lib/ashldi3.c +++ b/arch/mips/lib/ashldi3.c @@ -2,7 +2,7 @@ #include "libgcc.h" -long long __ashldi3(long long u, word_type b) +long long notrace __ashldi3(long long u, word_type b) { DWunion uu, w; word_type bm; 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; diff --git a/arch/mips/lib/bswapdi.c b/arch/mips/lib/bswapdi.c index 77e5f9c1f005..e3e77aa52c95 100644 --- a/arch/mips/lib/bswapdi.c +++ b/arch/mips/lib/bswapdi.c @@ -1,6 +1,6 @@ #include <linux/module.h> -unsigned long long __bswapdi2(unsigned long long u) +unsigned long long notrace __bswapdi2(unsigned long long u) { return (((u) & 0xff00000000000000ull) >> 56) | (((u) & 0x00ff000000000000ull) >> 40) | diff --git a/arch/mips/lib/bswapsi.c b/arch/mips/lib/bswapsi.c index 2b302ff121d2..530a8afe6fda 100644 --- a/arch/mips/lib/bswapsi.c +++ b/arch/mips/lib/bswapsi.c @@ -1,6 +1,6 @@ #include <linux/module.h> -unsigned int __bswapsi2(unsigned int u) +unsigned int notrace __bswapsi2(unsigned int u) { return (((u) & 0xff000000) >> 24) | (((u) & 0x00ff0000) >> 8) | 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 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; diff --git a/arch/mips/lib/ucmpdi2.c b/arch/mips/lib/ucmpdi2.c index bb4cb2f828ea..bd599f58234c 100644 --- a/arch/mips/lib/ucmpdi2.c +++ b/arch/mips/lib/ucmpdi2.c @@ -2,7 +2,7 @@ #include "libgcc.h" -word_type __ucmpdi2(unsigned long long a, unsigned long long b) +word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b) { const DWunion au = {.ll = a}; const DWunion bu = {.ll = b}; |