/* * Copyright (C) 2015 Josh Poimboeuf * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #ifndef _OBJTOOL_ELF_H #define _OBJTOOL_ELF_H #include #include #include #include #ifdef LIBELF_USE_DEPRECATED # define elf_getshdrnum elf_getshnum # define elf_getshdrstrndx elf_getshstrndx #endif struct section { struct list_head list; GElf_Shdr sh; struct list_head symbol_list; DECLARE_HASHTABLE(symbol_hash, 8); struct list_head rela_list; DECLARE_HASHTABLE(rela_hash, 16); struct section *base, *rela; struct symbol *sym; Elf_Data *elf_data; char *name; int idx; unsigned long data; unsigned int len; }; struct symbol { struct list_head list; struct hlist_node hash; GElf_Sym sym; struct section *sec; char *name; unsigned int idx; unsigned char bind, type; unsigned long offset; unsigned int len; }; struct rela { struct list_head list; struct hlist_node hash; GElf_Rela rela; struct symbol *sym; unsigned int type; unsigned long offset; int addend; }; struct elf { Elf *elf; GElf_Ehdr ehdr; int fd; char *name; struct list_head sections; DECLARE_HASHTABLE(rela_hash, 16); }; struct elf *elf_open(const char *name); struct section *find_section_by_name(struct elf *elf, const char *name); struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset); struct rela *find_rela_by_dest(struct section *sec, unsigned long offset); struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset, unsigned int len); struct symbol *find_containing_func(struct section *sec, unsigned long offset); void elf_close(struct elf *elf); #endif /* _OBJTOOL_ELF_H */ value='author'>author

path: root/net/sched/cls_api.c

href='/cgit.cgi/linux/net-next.git/commit/tools/build/feature?h=nds-private-remove&id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>feature/test-hello.c

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author	Thomas Gleixner <tglx@linutronix.de>	2017-01-31 23:58:38 +0100
committer	Ingo Molnar <mingo@kernel.org>	2017-02-01 08:37:27 +0100
commit	dd86e373e09fb16b83e8adf5c48c421a4ca76468 (patch)
tree	55703c2ea8584e303e342090614e0aab3509ab21 /tools/build/feature/test-hello.c
parent	0b3589be9b98994ce3d5aeca52445d1f5627c4ba (diff)

perf/x86/intel/rapl: Make package handling more robust

The package management code in RAPL relies on package mapping being available before a CPU is started. This changed with: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>

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