#ifndef __PERF_CPUMAP_H #define __PERF_CPUMAP_H #include #include #include #include "perf.h" #include "util/debug.h" struct cpu_map { atomic_t refcnt; int nr; int map[]; }; struct cpu_map *cpu_map__new(const char *cpu_list); struct cpu_map *cpu_map__empty_new(int nr); struct cpu_map *cpu_map__dummy_new(void); struct cpu_map *cpu_map__new_data(struct cpu_map_data *data); struct cpu_map *cpu_map__read(FILE *file); size_t cpu_map__snprint(struct cpu_map *map, char *buf, size_t size); size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp); int cpu_map__get_socket_id(int cpu); int cpu_map__get_socket(struct cpu_map *map, int idx, void *data); int cpu_map__get_core_id(int cpu); int cpu_map__get_core(struct cpu_map *map, int idx, void *data); int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp); int cpu_map__build_core_map(struct cpu_map *cpus, struct cpu_map **corep); struct cpu_map *cpu_map__get(struct cpu_map *map); void cpu_map__put(struct cpu_map *map); static inline int cpu_map__socket(struct cpu_map *sock, int s) { if (!sock || s > sock->nr || s < 0) return 0; return sock->map[s]; } static inline int cpu_map__id_to_socket(int id) { return id >> 16; } static inline int cpu_map__id_to_cpu(int id) { return id & 0xffff; } static inline int cpu_map__nr(const struct cpu_map *map) { return map ? map->nr : 1; } static inline bool cpu_map__empty(const struct cpu_map *map) { return map ? map->map[0] == -1 : true; } int cpu__setup_cpunode_map(void); int cpu__max_node(void); int cpu__max_cpu(void); int cpu__get_node(int cpu); int cpu_map__build_map(struct cpu_map *cpus, struct cpu_map **res, int (*f)(struct cpu_map *map, int cpu, void *data), void *data); int cpu_map__cpu(struct cpu_map *cpus, int idx); bool cpu_map__has(struct cpu_map *cpus, int cpu); int cpu_map__idx(struct cpu_map *cpus, int cpu); #endif /* __PERF_CPUMAP_H */ 3c0429f3b4b748bf2b6d'>commitdiff
path: root/net/6lowpan/nhc_ghc_ext_dest.c
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authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /net/dccp/ackvec.h
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'net/dccp/ackvec.h')