#ifndef CORKING_H #define CORKING_H #include extern void set_tcp_cork(int fd); extern void set_tcp_uncork(int fd); extern void set_udp_cork(int fd); extern void set_udp_uncork(int fd); extern void set_sock_cork(int fd, bool is_udp); extern void set_sock_uncork(int fd, bool is_udp); #endif /* CORKING_H */ anz.ch/cgit.cgi/linux/net-next.git/atom/?h=nds-private-remove' type='application/atom+xml'/>
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authorMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>2016-08-05 19:13:12 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2016-08-09 14:50:19 +1000
commite325d76f8bd2d222a1f577aba00dfb43cece4cbc (patch)
tree836a040e5903fd87956f89a1368fc16e7af2c5ca
parent4d9021957b5218310e28767f25551ca8f5eac797 (diff)
powerpc/powernv: Load correct TOC pointer while waking up from winkle.
The function pnv_restore_hyp_resource() loads the TOC into r2 from the invalid PACA pointer before fixing r13 value. This do not affect POWER ISA 3.0 but it does have an impact on POWER ISA 2.07 or less leading CPU to get stuck forever. login: [ 471.830433] Processor 120 is stuck. This can be easily reproducible using following steps: - Turn off SMT $ ppc64_cpu --smt=off - offline/online any online cpu (Thread 0 of any core which is online) $ echo 0 > /sys/devices/system/cpu/cpu<num>/online $ echo 1 > /sys/devices/system/cpu/cpu<num>/online For POWER ISA 2.07 or less, the last bit of HSPRG0 is set indicating that thread is waking up from winkle. Hence, the last bit of HSPRG0(r13) needs to be clear before accessing it as PACA to avoid loading invalid values from invalid PACA pointer. Fix this by loading TOC after r13 register is corrected. Fixes: bcef83a00dc4 ("powerpc/powernv: Add platform support for stop instruction") Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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