[PATCH 4.4 009/118] powerpc/tm: do not use r13 for tabort_syscall

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Nicholas Piggin commit cc7786d3ee7e3c979799db834b528db2c0834c2e upstream. tabort_syscall runs with RI=1, so a nested recoverable machine check will load the paca into r13

[PATCH 4.4 009/118] powerpc/tm: do not use r13 for tabort_syscall

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Nicholas Piggin commit cc7786d3ee7e3c979799db834b528db2c0834c2e upstream. tabort_syscall runs with RI=1, so a nested recoverable machine check will load the paca into r13 and overwrite what we