forked from luck/tmp_suning_uos_patched
aedcfbe065
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>
12 lines
254 B
C
12 lines
254 B
C
#include <linux/module.h>
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unsigned int notrace __bswapsi2(unsigned int u)
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{
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return (((u) & 0xff000000) >> 24) |
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(((u) & 0x00ff0000) >> 8) |
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(((u) & 0x0000ff00) << 8) |
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(((u) & 0x000000ff) << 24);
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}
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EXPORT_SYMBOL(__bswapsi2);
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