[Qemu-devel] [Bug 793317] Re: Large amount of write-only variables

[Brad Hards]

Ok, looking at the first example (line 526), I see code that looks like:

static inline int ohci_put_iso_td(OHCIState *ohci,
                                  uint32_t addr, struct ohci_iso_td *td)
{
    return (put_dwords(ohci, addr, (uint32_t *)td, 4) &&
            put_words(ohci, addr + 16, td->offset, 8));
}

Is that what you see? Because I don't see any variables that are only
set.

Of course you're using a newer compiler, but I'm still not sure I can
see the problem.

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https://bugs.launchpad.net/bugs/793317

Title:
  Large amount of write-only variables

Status in QEMU:
  New

Bug description:
  Whenever I try to compile the source from the git repo, it gets a
  large number of "set but not used" errors, in files such as:

  hw/usb_ochi.c (line 526, 1114, and 1108)
  hw/lsi53c895a.c (line 892)
  kvm.c (line 973)
  target-alpha/translate.c (line 1472, 1470)
  linux-user/syscall.c (line 7062, 3754)
  exec.c (line 1211)
  linux-user/linuxload.c (line 60)

  Really now, why would anyone create so many write-only variables
  knowing that it's compiled with write-only variables causing errors..?

  Host: Fedora 15 i686
  Gcc: 4.6.0
  Guest: None
  I pulled the code from the git repo earlier today, so I'm pretty sure it did 
not get fixed in that short timeframe.