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authorIan Rogers <irogers@google.com>2024-05-06 21:01:04 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2024-05-06 22:08:31 +0300
commit37862d6fdced70a72b5a06d8f3440f7c567d5272 (patch)
tree9f678c887c5f8191a2f71e444c2cbe17e6a99644 /fs/ubifs/tnc.c
parent23106e318888849e95babe4c2bdc8a1a948ac36d (diff)
downloadlinux-37862d6fdced70a72b5a06d8f3440f7c567d5272.tar.xz
perf dso: Use container_of() to avoid a pointer in 'struct dso_data'
The dso pointer in 'struct dso_data' is necessary for reference count checking to account for the dso_data forming a global list of open dso's with references to the dso. The dso pointer also allows for the indirection that reference count checking needs. Outside of reference count checking the indirection isn't needed and container_of() is more efficient and saves space. The reference count won't be increased by placing items onto the global list, matching how things were before the reference count checking change, but we assert the dso is in dsos holding it live (and that the set of open dsos is a subset of all dsos for the machine). Update the DSO data tests so that they use a dsos struct to make the invariant true. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Changbin Du <changbin.du@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Link: https://lore.kernel.org/r/20240506180104.485674-5-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'fs/ubifs/tnc.c')
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