linux-stable/arch/powerpc/kernel/cacheinfo.h
Nathan Lynch d4aa219a07 powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild
Allow external callers to force the cacheinfo code to release all its
references to cache nodes, e.g. before processing device tree updates
post-migration, and to rebuild the hierarchy afterward.

CPU online/offline must be blocked by callers; enforce this.

Fixes: 410bccf978 ("powerpc/pseries: Partition migration in the kernel")
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-15 16:52:06 +10:00

13 lines
425 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _PPC_CACHEINFO_H
#define _PPC_CACHEINFO_H
/* These are just hooks for sysfs.c to use. */
extern void cacheinfo_cpu_online(unsigned int cpu_id);
extern void cacheinfo_cpu_offline(unsigned int cpu_id);
/* Allow migration/suspend to tear down and rebuild the hierarchy. */
extern void cacheinfo_teardown(void);
extern void cacheinfo_rebuild(void);
#endif /* _PPC_CACHEINFO_H */