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Created with Raphaël 2.2.031May268Mar20Oct17161512828Sep24119328Aug22212020Dec28Nov20Oct12130Sep272625191815531Aug30292827242322212014109829Jun19Oct181317Sep87654330Aug2928262524232019161514131211109876429Jul28272621201817161512111065128Jun272624222116151312tab policemove fork into proc.cmissed this file in last checkinmove T_DIR etc into stat.h; move type upAdd serial port input/output.slight rearrangement; sleep on b not buf.be consistent: no underscores in function namesxv6: boot loader adjustmentsxv6: use stosb for memsetxv6/x86.h: add stosb, fix bugs in insl/outsl (rep not repne)xv6/x86.h: inline assembly cleanupExplain why itrunc() is OK w.r.t. crashes.try harder to get directory refcounts rightmake mkdir crash-safer, as noticed by many students on midtermfree the indirect blockas rtm noticed, avoid doubly-freeing pipe pageindentcleaner swtch.Ssave cpus.intena in sched(), so we get the right EFLAGS.IF value once acheck cp->killed before returning to user from a timer interruptupdate .cvsignoreminor cleanupminor cleanup with STUB macroinclude explicitly initialized globals (int x = 0;) in cross-refs,fix: when two names only differed in case, crossrefs only included one of them.be clear what the root i-number isdocument lock->locked=0 vs xchg(&lock->locked, 0)trap 9 does not push ec: fix from Greg Price <price@mit.edu>always save and restore %fs, %gs to ensure old segment entries are neverrestore std toolprefixomit *.d from tar fileadd copyright noticemake bochsrc work for bochs 2.2.6make pdf, ps, tarballnits in index.txtDO NOT MAIL: xv6 web pagessimplify growprocavoid a bug w/ exit()