[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 08/18] xen/shbuf: switch xen-front-pgdir-shbuf to use INVALID_GRANT_REF
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> --- drivers/xen/xen-front-pgdir-shbuf.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) diff --git a/drivers/xen/xen-front-pgdir-shbuf.c b/drivers/xen/xen-front-pgdir-shbuf.c index a959dee21134..fa2921d4fbfc 100644 --- a/drivers/xen/xen-front-pgdir-shbuf.c +++ b/drivers/xen/xen-front-pgdir-shbuf.c @@ -21,15 +21,6 @@ #include <xen/xen-front-pgdir-shbuf.h> -#ifndef GRANT_INVALID_REF -/* - * FIXME: usage of grant reference 0 as invalid grant reference: - * grant reference 0 is valid, but never exposed to a PV driver, - * because of the fact it is already in use/reserved by the PV console. - */ -#define GRANT_INVALID_REF 0 -#endif - /** * This structure represents the structure of a shared page * that contains grant references to the pages of the shared @@ -83,7 +74,7 @@ grant_ref_t xen_front_pgdir_shbuf_get_dir_start(struct xen_front_pgdir_shbuf *buf) { if (!buf->grefs) - return GRANT_INVALID_REF; + return INVALID_GRANT_REF; return buf->grefs[0]; } @@ -142,7 +133,7 @@ void xen_front_pgdir_shbuf_free(struct xen_front_pgdir_shbuf *buf) int i; for (i = 0; i < buf->num_grefs; i++) - if (buf->grefs[i] != GRANT_INVALID_REF) + if (buf->grefs[i] != INVALID_GRANT_REF) gnttab_end_foreign_access(buf->grefs[i], 0UL); } kfree(buf->grefs); @@ -355,7 +346,7 @@ static void backend_fill_page_dir(struct xen_front_pgdir_shbuf *buf) } /* Last page must say there is no more pages. */ page_dir = (struct xen_page_directory *)ptr; - page_dir->gref_dir_next_page = GRANT_INVALID_REF; + page_dir->gref_dir_next_page = INVALID_GRANT_REF; } /** @@ -384,7 +375,7 @@ static void guest_fill_page_dir(struct xen_front_pgdir_shbuf *buf) if (grefs_left <= XEN_NUM_GREFS_PER_PAGE) { to_copy = grefs_left; - page_dir->gref_dir_next_page = GRANT_INVALID_REF; + page_dir->gref_dir_next_page = INVALID_GRANT_REF; } else { to_copy = XEN_NUM_GREFS_PER_PAGE; page_dir->gref_dir_next_page = buf->grefs[i + 1]; -- 2.34.1
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