Samuel Thibault
2008-Jun-17 16:54 UTC
[Xen-devel] [PATCH] minios: fix gnttab allocation boundary
minios: fix gnttab allocation boundary The gnttab_sem is already fed during initialization''s put_free_entry loop. Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com> diff -r 78f90b0f707f extras/mini-os/gnttab.c --- a/extras/mini-os/gnttab.c Tue Jun 17 14:45:18 2008 +0100 +++ b/extras/mini-os/gnttab.c Tue Jun 17 17:53:51 2008 +0100 @@ -35,7 +35,7 @@ #ifdef GNT_DEBUG static char inuse[NR_GRANT_ENTRIES]; #endif -static __DECLARE_SEMAPHORE_GENERIC(gnttab_sem, NR_GRANT_ENTRIES); +static __DECLARE_SEMAPHORE_GENERIC(gnttab_sem, 0); static void put_free_entry(grant_ref_t ref) @@ -60,6 +60,7 @@ down(&gnttab_sem); local_irq_save(flags); ref = gnttab_list[0]; + BUG_ON(ref < NR_RESERVED_ENTRIES || ref >= NR_GRANT_ENTRIES); gnttab_list[0] = gnttab_list[ref]; #ifdef GNT_DEBUG BUG_ON(inuse[ref]); _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel