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| author | Juergen Gross <jgross@suse.com> | 2022-02-25 16:05:42 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-11 10:15:13 +0100 |
| commit | c900f34fc134cc75de431e16546f37bf7804a012 (patch) | |
| tree | 34a747010f6a2af678eccc41de2addfc5725f7cd | |
| parent | fbc57368ea527dcfa909908fc47a851a56e4e5ce (diff) | |
| download | linux-stable-c900f34fc134cc75de431e16546f37bf7804a012.tar.gz linux-stable-c900f34fc134cc75de431e16546f37bf7804a012.tar.bz2 linux-stable-c900f34fc134cc75de431e16546f37bf7804a012.zip | |
xen: remove gnttab_query_foreign_access()
Commit 1dbd11ca75fe664d3e54607547771d021f531f59 upstream.
Remove gnttab_query_foreign_access(), as it is unused and unsafe to
use.
All previous use cases assumed a grant would not be in use after
gnttab_query_foreign_access() returned 0. This information is useless
in best case, as it only refers to a situation in the past, which could
have changed already.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/xen/grant-table.c | 25 | ||||
| -rw-r--r-- | include/xen/grant_table.h | 2 |
2 files changed, 0 insertions, 27 deletions
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index 9524806eb4b9..1e785e65249a 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -134,13 +134,6 @@ struct gnttab_ops { * return the frame. */ unsigned long (*end_foreign_transfer_ref)(grant_ref_t ref); - /* - * Query the status of a grant entry. Ref parameter is reference of - * queried grant entry, return value is the status of queried entry. - * Detailed status(writing/reading) can be gotten from the return value - * by bit operations. - */ - int (*query_foreign_access)(grant_ref_t ref); }; struct unmap_refs_callback_data { @@ -285,22 +278,6 @@ int gnttab_grant_foreign_access(domid_t domid, unsigned long frame, } EXPORT_SYMBOL_GPL(gnttab_grant_foreign_access); -static int gnttab_query_foreign_access_v1(grant_ref_t ref) -{ - return gnttab_shared.v1[ref].flags & (GTF_reading|GTF_writing); -} - -static int gnttab_query_foreign_access_v2(grant_ref_t ref) -{ - return grstatus[ref] & (GTF_reading|GTF_writing); -} - -int gnttab_query_foreign_access(grant_ref_t ref) -{ - return gnttab_interface->query_foreign_access(ref); -} -EXPORT_SYMBOL_GPL(gnttab_query_foreign_access); - static int gnttab_end_foreign_access_ref_v1(grant_ref_t ref, int readonly) { u16 flags, nflags; @@ -1307,7 +1284,6 @@ static const struct gnttab_ops gnttab_v1_ops = { .update_entry = gnttab_update_entry_v1, .end_foreign_access_ref = gnttab_end_foreign_access_ref_v1, .end_foreign_transfer_ref = gnttab_end_foreign_transfer_ref_v1, - .query_foreign_access = gnttab_query_foreign_access_v1, }; static const struct gnttab_ops gnttab_v2_ops = { @@ -1319,7 +1295,6 @@ static const struct gnttab_ops gnttab_v2_ops = { .update_entry = gnttab_update_entry_v2, .end_foreign_access_ref = gnttab_end_foreign_access_ref_v2, .end_foreign_transfer_ref = gnttab_end_foreign_transfer_ref_v2, - .query_foreign_access = gnttab_query_foreign_access_v2, }; static bool gnttab_need_v2(void) diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h index 7628ab25f686..7087c9fea80f 100644 --- a/include/xen/grant_table.h +++ b/include/xen/grant_table.h @@ -118,8 +118,6 @@ int gnttab_grant_foreign_transfer(domid_t domid, unsigned long pfn); unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref); unsigned long gnttab_end_foreign_transfer(grant_ref_t ref); -int gnttab_query_foreign_access(grant_ref_t ref); - /* * operations on reserved batches of grant references */ |