#ifndef XMALLOC_H #define XMALLOC_H #include #include "built_in.h" #include "die.h" extern void *xmalloc(size_t size) __hidden __warn_unused_result; extern void *xcalloc(size_t nmemb, size_t size) __hidden __warn_unused_result; extern void *xzmalloc(size_t size) __hidden __warn_unused_result; extern void *xmallocz(size_t size) __hidden __warn_unused_result; extern void *xmalloc_aligned(size_t size, size_t alignment) __hidden __warn_unused_result; extern void *xzmalloc_aligned(size_t size, size_t alignment) __hidden __warn_unused_result; extern void *xmemdupz(const void *data, size_t len) __hidden __warn_unused_result; extern void *xrealloc(void *ptr, size_t size) __hidden __warn_unused_result; extern void xfree_func(void *ptr) __hidden; extern char *xstrdup(const char *str) __hidden __warn_unused_result; extern char *xstrndup(const char *str, size_t size) __hidden __warn_unused_result; static inline void __xfree(void *ptr) { if (unlikely((ptr) == NULL)) panic("xfree: NULL pointer given as argument\n"); free(ptr); } #define xzfree(ptr, size) \ do { \ xmemset(ptr, 0, size); \ xfree(ptr); \ } while (0) #define xfree(ptr) \ do { \ __xfree(ptr); \ (ptr) = NULL; \ } while (0) #endif /* XMALLOC_H */ net-next plumbingsTobias Klauser
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 23:58:38 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-01 08:37:27 +0100
commitdd86e373e09fb16b83e8adf5c48c421a4ca76468 (patch)
tree55703c2ea8584e303e342090614e0aab3509ab21 /include/drm/drm_vma_manager.h
parent0b3589be9b98994ce3d5aeca52445d1f5627c4ba (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>
Diffstat (limited to 'include/drm/drm_vma_manager.h')