[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Update gnttab_free_callback_list locking.
# HG changeset patch # User cl349@xxxxxxxxxxxxxxxxxxxx # Node ID 96f1f6c710891448318a6287a10e004297fb8563 # Parent af9e3ae3a9b1e342514305399fe5dcdfa5639385 Update gnttab_free_callback_list locking. Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx> diff -r af9e3ae3a9b1 -r 96f1f6c71089 linux-2.6-xen-sparse/arch/xen/kernel/gnttab.c --- a/linux-2.6-xen-sparse/arch/xen/kernel/gnttab.c Tue Aug 23 08:45:13 2005 +++ b/linux-2.6-xen-sparse/arch/xen/kernel/gnttab.c Tue Aug 23 09:24:46 2005 @@ -68,13 +68,11 @@ return fh; } -static void do_free_callbacks(void) -{ - struct gnttab_free_callback *callback, *next; - spin_lock_irq(&gnttab_free_callback_list_lock); - callback = gnttab_free_callback_list; +static void do_free_callbacks(unsigned long flags) +{ + struct gnttab_free_callback *callback = gnttab_free_callback_list, *next; gnttab_free_callback_list = NULL; - spin_unlock_irq(&gnttab_free_callback_list_lock); + spin_unlock_irqrestore(&gnttab_free_callback_list_lock, flags); while (callback) { next = callback->next; callback->next = NULL; @@ -88,12 +86,14 @@ grant_ref_t ref) { grant_ref_t fh, nfh = gnttab_free_head; + unsigned long flags; do { gnttab_free_list[ref] = fh = nfh; wmb(); } while ( unlikely((nfh = cmpxchg(&gnttab_free_head, fh, ref)) != fh) ); - spin_lock_irq(&gnttab_free_callback_list_lock); + spin_lock_irqsave(&gnttab_free_callback_list_lock, flags); if ( unlikely(gnttab_free_callback_list) ) - do_free_callbacks(); - spin_unlock_irq(&gnttab_free_callback_list_lock); + do_free_callbacks(flags); + else + spin_unlock_irqrestore(&gnttab_free_callback_list_lock, flags); } /* @@ -276,14 +276,15 @@ gnttab_request_free_callback(struct gnttab_free_callback *callback, void (*fn)(void *), void *arg) { + unsigned long flags; if (callback->next) return; callback->fn = fn; callback->arg = arg; - spin_lock_irq(&gnttab_free_callback_list_lock); + spin_lock_irqsave(&gnttab_free_callback_list_lock, flags); callback->next = gnttab_free_callback_list; gnttab_free_callback_list = callback; - spin_unlock_irq(&gnttab_free_callback_list_lock); + spin_unlock_irqrestore(&gnttab_free_callback_list_lock, flags); } /* _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |