cvs commit: src/sys/kern subr_prf.c

[Robert Watson]

rwatson     2005-09-29 18:45:02 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_5)
    sys/kern             subr_prf.c 
  Log:
  Merge subr_prof.c:1.119, 1.120, 1.121 from HEAD to RELENG_6:
  
    Acquire Giant in uprintf() and tprintf() due to the non-MPSAFEty of
    the tty code invoked from these functions.
  
    Correct age-old comments about uprintf()/tprintf() sleeping: they
    will never sleep.
  
  Unlike in the merge to RELENG_6, it is not necesary to acquire Giant
  in the NFS code, as the NFS client runs entirely under Giant in 5.x.
  Likewise, this is not a critical fix in 5.x as the vast majority of
  relevant calls to uprintf() are in the VFS code, which also runs
  with Giant in 5.x.  However, there are some exposed code paths that
  make this MFC a good idea.
  
  Much useful feedback from:      bde
  Approved by:                    re (scottl)
  
  Revision   Changes    Path
  1.113.2.2  +13 -8     src/sys/kern/subr_prf.c