Messages in this thread | | | Date | Wed, 16 Aug 2006 12:26:03 +0200 | From | Heiko Carstens <> | Subject | Re: [PATCH] kexec warning fix |
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On Wed, Aug 16, 2006 at 02:01:05AM -0700, Roland McGrath wrote: > > This fixes a couple of compiler warnings, and adds paranoia checks to boot. > > Signed-off-by: Roland McGrath <roland@redhat.com> > --- > kernel/kexec.c | 6 ++++-- > 1 files changed, 4 insertions(+), 2 deletions(-) > > diff --git a/kernel/kexec.c b/kernel/kexec.c > index 50087ec..989c7cd 100644 > --- a/kernel/kexec.c > +++ b/kernel/kexec.c > @@ -995,7 +995,8 @@ asmlinkage long sys_kexec_load(unsigned > image = xchg(dest_image, image); > > out: > - xchg(&kexec_lock, 0); /* Release the mutex */ > + locked = xchg(&kexec_lock, 0); /* Release the mutex */ > + BUG_ON(!locked); > kimage_free(image); > > return result; > @@ -1061,7 +1062,8 @@ void crash_kexec(struct pt_regs *regs) > machine_crash_shutdown(&fixed_regs); > machine_kexec(kexec_crash_image); > } > - xchg(&kexec_lock, 0); > + locked = xchg(&kexec_lock, 0); > + BUG_ON(!locked); > } > }
On s390 I changed the xchg macro, so gcc 4.x doesn't warn anymore about unused return values. Maybe something similar would be needed on other architectures as well? See commit 5a651c93d3a823af63b1b15bb94fdc951670fb2f . - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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