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On some platforms(arm/arm64) which uses cpus map to get corresponding cpuid string, cpuid can be NULL for PMUs other than CORE PMUs. Adding check for NULL cpuid in function perf_pmu__find_map to avoid segmentation fault. Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Ganapatrao Kulkarni <gklkml16@gmail.com> Cc: Jayachandran C <jnair@caviumnetworks.com> Cc: Jonathan Cameron <jonathan.cameron@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@cavium.com> Cc: Shaokun Zhang <zhangshaokun@hisilicon.com> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20171016183222.25750-6-ganapatrao.kulkarni@cavium.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.