Hi,
Can we please backport upstream ecd43afdbe72017aefe48080631eb625e177ef4d
("ARCv2:
save r30 on kernel entry as gcc uses it for code-gen") to 4.2 to 4.9 kernels.
While the issue cites gcc, it is general deficiency of kernel as userspace
programs can modify r30 register in hand/inline assembly and those will not be
preserved without this change.
Thx,
-Vineet
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