diff options
author | Juergen Gross <jgross@suse.com> | 2020-03-09 18:54:41 +0300 |
---|---|---|
committer | Juergen Gross <jgross@suse.com> | 2020-03-30 18:30:46 +0300 |
commit | b28089a7ad9d07b1b35e2b781a66a200f8b8e20d (patch) | |
tree | 3ea140d2289a91ec0e860f5e5f39ee52e8bdb5b0 | |
parent | 7111951b8d4973bda27ff663f2cf18b663d15b48 (diff) | |
download | linux-b28089a7ad9d07b1b35e2b781a66a200f8b8e20d.tar.xz |
xen/xenbus: remove unused xenbus_map_ring()
xenbus_map_ring() is used nowhere in the tree, remove it.
xenbus_unmap_ring() is used only locally, so make it static and move it
up.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
-rw-r--r-- | drivers/xen/xenbus/xenbus_client.c | 126 | ||||
-rw-r--r-- | include/xen/xenbus.h | 7 |
2 files changed, 42 insertions, 91 deletions
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c index e17ca8156171..31eb822ac313 100644 --- a/drivers/xen/xenbus/xenbus_client.c +++ b/drivers/xen/xenbus/xenbus_client.c @@ -517,6 +517,48 @@ static int __xenbus_map_ring(struct xenbus_device *dev, return err; } +/** + * xenbus_unmap_ring + * @dev: xenbus device + * @handles: grant handle array + * @nr_handles: number of handles in the array + * @vaddrs: addresses to unmap + * + * Unmap memory in this domain that was imported from another domain. + * Returns 0 on success and returns GNTST_* on error + * (see xen/include/interface/grant_table.h). + */ +static int xenbus_unmap_ring(struct xenbus_device *dev, grant_handle_t *handles, + unsigned int nr_handles, unsigned long *vaddrs) +{ + struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS]; + int i; + int err; + + if (nr_handles > XENBUS_MAX_RING_GRANTS) + return -EINVAL; + + for (i = 0; i < nr_handles; i++) + gnttab_set_unmap_op(&unmap[i], vaddrs[i], + GNTMAP_host_map, handles[i]); + + if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i)) + BUG(); + + err = GNTST_okay; + for (i = 0; i < nr_handles; i++) { + if (unmap[i].status != GNTST_okay) { + xenbus_dev_error(dev, unmap[i].status, + "unmapping page at handle %d error %d", + handles[i], unmap[i].status); + err = unmap[i].status; + break; + } + } + + return err; +} + struct map_ring_valloc_hvm { unsigned int idx; @@ -608,45 +650,6 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev, return err; } - -/** - * xenbus_map_ring - * @dev: xenbus device - * @gnt_refs: grant reference array - * @nr_grefs: number of grant reference - * @handles: pointer to grant handle to be filled - * @vaddrs: addresses to be mapped to - * @leaked: fail to clean up a failed map, caller should not free vaddr - * - * Map pages of memory into this domain from another domain's grant table. - * xenbus_map_ring does not allocate the virtual address space (you must do - * this yourself!). It only maps in the pages to the specified address. - * Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h) - * or -ENOMEM / -EINVAL on error. If an error is returned, device will switch to - * XenbusStateClosing and the first error message will be saved in XenStore. - * Further more if we fail to map the ring, caller should check @leaked. - * If @leaked is not zero it means xenbus_map_ring fails to clean up, caller - * should not free the address space of @vaddr. - */ -int xenbus_map_ring(struct xenbus_device *dev, grant_ref_t *gnt_refs, - unsigned int nr_grefs, grant_handle_t *handles, - unsigned long *vaddrs, bool *leaked) -{ - phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS]; - int i; - - if (nr_grefs > XENBUS_MAX_RING_GRANTS) - return -EINVAL; - - for (i = 0; i < nr_grefs; i++) - phys_addrs[i] = (unsigned long)vaddrs[i]; - - return __xenbus_map_ring(dev, gnt_refs, nr_grefs, handles, - phys_addrs, GNTMAP_host_map, leaked); -} -EXPORT_SYMBOL_GPL(xenbus_map_ring); - - /** * xenbus_unmap_ring_vfree * @dev: xenbus device @@ -859,51 +862,6 @@ static int xenbus_unmap_ring_vfree_hvm(struct xenbus_device *dev, void *vaddr) } /** - * xenbus_unmap_ring - * @dev: xenbus device - * @handles: grant handle array - * @nr_handles: number of handles in the array - * @vaddrs: addresses to unmap - * - * Unmap memory in this domain that was imported from another domain. - * Returns 0 on success and returns GNTST_* on error - * (see xen/include/interface/grant_table.h). - */ -int xenbus_unmap_ring(struct xenbus_device *dev, - grant_handle_t *handles, unsigned int nr_handles, - unsigned long *vaddrs) -{ - struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS]; - int i; - int err; - - if (nr_handles > XENBUS_MAX_RING_GRANTS) - return -EINVAL; - - for (i = 0; i < nr_handles; i++) - gnttab_set_unmap_op(&unmap[i], vaddrs[i], - GNTMAP_host_map, handles[i]); - - if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i)) - BUG(); - - err = GNTST_okay; - for (i = 0; i < nr_handles; i++) { - if (unmap[i].status != GNTST_okay) { - xenbus_dev_error(dev, unmap[i].status, - "unmapping page at handle %d error %d", - handles[i], unmap[i].status); - err = unmap[i].status; - break; - } - } - - return err; -} -EXPORT_SYMBOL_GPL(xenbus_unmap_ring); - - -/** * xenbus_read_driver_state * @path: path for driver * diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h index 850a43bd69d3..8c0d1edc121c 100644 --- a/include/xen/xenbus.h +++ b/include/xen/xenbus.h @@ -209,15 +209,8 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr, unsigned int nr_pages, grant_ref_t *grefs); int xenbus_map_ring_valloc(struct xenbus_device *dev, grant_ref_t *gnt_refs, unsigned int nr_grefs, void **vaddr); -int xenbus_map_ring(struct xenbus_device *dev, - grant_ref_t *gnt_refs, unsigned int nr_grefs, - grant_handle_t *handles, unsigned long *vaddrs, - bool *leaked); int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr); -int xenbus_unmap_ring(struct xenbus_device *dev, - grant_handle_t *handles, unsigned int nr_handles, - unsigned long *vaddrs); int xenbus_alloc_evtchn(struct xenbus_device *dev, int *port); int xenbus_free_evtchn(struct xenbus_device *dev, int port); |