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 oBAcg6Tq TRPtcd/urB3dCvWNz7wACsB9fx36krfgI44hxxmVtmiD82v79JQmtYfxwFC7RqW5FsFi2M4rMytuH9eFGuRVNm71bkv2l3QBwg/DiQjAPbo+IQzds/SzZIdtfo2eEJ6HdBHgFz6sY8yQ+1hcLkZZ++OKBsw8rTPnC2LC5clf0HjoSy24hbs1LPZpeZEO4KeqQZh2L7Q7Taw/XhjHVMEUpehMqhVuuJ2g+U17eeR36I4qE59sCCNu1ZOWnsVsNtveTw/pIx8grg60O2o3ZfeEebxwUrGyAEMftEElkN8m9V5hdtJYz4BO4NZpUrLHqEWqkttAeB35K7bIDgkCMykJdH/l3TBst+OqjC/7hKlEnb1z1xD+F1p7vFCVEIgZiXaBcC12NXKv0E999gnnnoHBf8IR4+sCpTTCAQsCEcj+fYlulN20pbiTjBk0mME2HTRYB/Nc3IxvsGaxpgU+Z0AVPp5Ft8nNkBFpej3Yx4AeDc86uU31mVhQDtX1qVDPzYT+boFllzsX10Q5mwElghPvtahFF5kMiOXrmtFIPHAWh3wYJCAuTYnVaBuVsjoOcTrHp4ZFkgqskvNrbe2qGeKcvpOSnijSmy5HOmcU3MKT779IURWwR4Spwci0frA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Oct 15, 2024 at 12:40:41PM -0700, Suren Baghdasaryan wrote: [snip] > > -struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags) > > +struct pid *__pidfd_get_pid(unsigned int pidfd, bool pin_pid, > > + bool allow_proc, unsigned int *flags, > > + struct fd *fd) > > { > > - struct fd f; > > + struct file *file; > > struct pid *pid; > > + struct fd f = fdget(pidfd); > > > > - f = fdget(fd); > > - if (!fd_file(f)) > > + file = fd_file(f); > > + if (!file) > > return ERR_PTR(-EBADF); > > > > - pid = pidfd_pid(fd_file(f)); > > - if (!IS_ERR(pid)) { > > - get_pid(pid); > > - *flags = fd_file(f)->f_flags; > > + pid = pidfd_pid(file); > > + /* If we allow opening a pidfd via /proc/, do so. */ > > + if (IS_ERR(pid) && allow_proc) > > + pid = tgid_pidfd_to_pid(file); > > + > > + if (IS_ERR(pid)) { > > + fdput(f); > > + return pid; > > } > > > > - fdput(f); > > + if (pin_pid) > > + get_pid(pid); > > + else > > + WARN_ON_ONCE(!fd); /* Nothing to keep pid/pidfd around? */ > > + > > + if (flags) > > + *flags = file->f_flags; > > + > > + /* > > + * If the user provides an fd output then it will handle decrementing > > + * its reference counter. > > + */ > > + if (fd) > > + *fd = f; > > + else > > + /* Otherwise we release it. */ > > + fdput(f); > > + > > return pid; > > } > > There is an EXPORT_SYMBOL_GPL(pidfd_get_pid) right after this line. It > should also be changed to EXPORT_SYMBOL_GPL(__pidfd_get_pid), > otherwise __pidfd_get_pid() will not be exported. A module calling > pidfd_get_pid() now inlined in the header file will try to call > __pidfd_get_pid() and will have trouble resolving this symbol. Hmm hang on not there isn't? I don't see that anywhere? [snip]