diff options
| author | Juergen Gross <jgross@suse.com> | 2022-05-24 14:46:30 +0300 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-05-27 12:05:29 +0300 |
| commit | 49f8b459fc1de5e3712b57c8ccefae9ec45270f8 (patch) | |
| tree | a94aa459860a3d82cae0933e922e1cbfaa980766 /include/xen | |
| parent | 5b3353949e89d48b4faf54a9cc241ee5d70df615 (diff) | |
| download | linux-49f8b459fc1de5e3712b57c8ccefae9ec45270f8.tar.xz | |
xen: switch gnttab_end_foreign_access() to take a struct page pointer
Instead of a virtual kernel address use a pointer of the associated
struct page as second parameter of gnttab_end_foreign_access().
Most users have that pointer available already and are creating the
virtual address from it, risking problems in case the memory is
located in highmem.
gnttab_end_foreign_access() itself won't need to get the struct page
from the address again.
Suggested-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/grant_table.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h index 7d0f2f0037b8..527c9907f99c 100644 --- a/include/xen/grant_table.h +++ b/include/xen/grant_table.h @@ -101,10 +101,10 @@ int gnttab_end_foreign_access_ref(grant_ref_t ref); * Eventually end access through the given grant reference, and once that * access has been ended, free the given page too. Access will be ended * immediately iff the grant entry is not in use, otherwise it will happen - * some time later. page may be 0, in which case no freeing will occur. + * some time later. page may be NULL, in which case no freeing will occur. * Note that the granted page might still be accessed (read or write) by the * other side after gnttab_end_foreign_access() returns, so even if page was - * specified as 0 it is not allowed to just reuse the page for other + * specified as NULL it is not allowed to just reuse the page for other * purposes immediately. gnttab_end_foreign_access() will take an additional * reference to the granted page in this case, which is dropped only after * the grant is no longer in use. @@ -112,7 +112,7 @@ int gnttab_end_foreign_access_ref(grant_ref_t ref); * gnttab_end_foreign_access() are done via alloc_pages_exact() (and freeing * via free_pages_exact()) in order to avoid high order pages. */ -void gnttab_end_foreign_access(grant_ref_t ref, unsigned long page); +void gnttab_end_foreign_access(grant_ref_t ref, struct page *page); /* * End access through the given grant reference, iff the grant entry is |