diff options
Diffstat (limited to 'backport/compat/backport-4.10.c')
| -rw-r--r-- | backport/compat/backport-4.10.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/backport/compat/backport-4.10.c b/backport/compat/backport-4.10.c index 44e02dd7..a35c699e 100644 --- a/backport/compat/backport-4.10.c +++ b/backport/compat/backport-4.10.c @@ -12,6 +12,8 @@ #include <linux/netdevice.h> #include <linux/ethtool.h> #include <linux/mii.h> +#include <linux/page_ref.h> +#include <linux/gfp.h> #if LINUX_VERSION_IS_GEQ(4,6,0) #if LINUX_VERSION_IS_LESS(4,7,0) @@ -252,3 +254,23 @@ int mii_ethtool_get_link_ksettings(struct mii_if_info *mii, } EXPORT_SYMBOL(mii_ethtool_get_link_ksettings); #endif /* LINUX_VERSION_IS_GEQ(4,6,0) */ + +#if LINUX_VERSION_IS_GEQ(4,2,0) +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) { + unsigned int order = compound_order(page); + + /* + * __free_pages_ok() is not exported so call + * __free_pages() which decrements the ref counter + * and increment the ref counter before. + */ + page_ref_inc(page); + __free_pages(page, order); + } +} +EXPORT_SYMBOL_GPL(__page_frag_cache_drain); +#endif |