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-rw-r--r--compat/include/linux/compat-3.9.h208
1 files changed, 208 insertions, 0 deletions
diff --git a/compat/include/linux/compat-3.9.h b/compat/include/linux/compat-3.9.h
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+++ b/compat/include/linux/compat-3.9.h
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+#ifndef LINUX_3_9_COMPAT_H
+#define LINUX_3_9_COMPAT_H
+
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0))
+
+#include <linux/idr.h>
+#include <linux/list.h>
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25))
+#include <linux/rculist.h>
+#endif
+#include <net/sock.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/printk.h>
+#include <linux/scatterlist.h>
+
+/* include this before changing hlist_for_each_* to use the old versions. */
+#include <net/sch_generic.h>
+
+/* Lets expect distributions might backport this */
+
+#ifndef for_each_sg_page
+/*
+ * sg page iterator
+ *
+ * Iterates over sg entries page-by-page. On each successful iteration,
+ * @piter->page points to the current page, @piter->sg to the sg holding this
+ * page and @piter->sg_pgoffset to the page's page offset within the sg. The
+ * iteration will stop either when a maximum number of sg entries was reached
+ * or a terminating sg (sg_last(sg) == true) was reached.
+ */
+struct sg_page_iter {
+ struct page *page; /* current page */
+ struct scatterlist *sg; /* sg holding the page */
+ unsigned int sg_pgoffset; /* page offset within the sg */
+
+ /* these are internal states, keep away */
+ unsigned int __nents; /* remaining sg entries */
+ int __pg_advance; /* nr pages to advance at the
+ * next step */
+};
+
+#define __sg_page_iter_next LINUX_BACKPORT(__sg_page_iter_next)
+bool __sg_page_iter_next(struct sg_page_iter *piter);
+#define __sg_page_iter_start LINUX_BACKPORT(__sg_page_iter_start)
+void __sg_page_iter_start(struct sg_page_iter *piter,
+ struct scatterlist *sglist, unsigned int nents,
+ unsigned long pgoffset);
+
+/**
+ * for_each_sg_page - iterate over the pages of the given sg list
+ * @sglist: sglist to iterate over
+ * @piter: page iterator to hold current page, sg, sg_pgoffset
+ * @nents: maximum number of sg entries to iterate over
+ * @pgoffset: starting page offset
+ */
+#define for_each_sg_page(sglist, piter, nents, pgoffset) \
+ for (__sg_page_iter_start((piter), (sglist), (nents), (pgoffset)); \
+ __sg_page_iter_next(piter);)
+
+#endif /* for_each_sg_page assumption */
+
+/* backports 7a555613 */
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#define dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, \
+ __builtin_constant_p(prefix_str) ? prefix_str : "hexdump");\
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ print_hex_dump(KERN_DEBUG, prefix_str, \
+ prefix_type, rowsize, groupsize, \
+ buf, len, ascii); \
+} while (0)
+#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii) \
+ dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii)
+#else
+#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii) \
+ print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii)
+#endif /* defined(CONFIG_DYNAMIC_DEBUG) */
+
+
+/**
+ * backport of idr idr_alloc() usage
+ *
+ * This backports a patch series send by Tejun Heo:
+ * https://lkml.org/lkml/2013/2/2/159
+ */
+static inline void compat_idr_destroy(struct idr *idp)
+{
+ idr_remove_all(idp);
+ idr_destroy(idp);
+}
+#define idr_destroy(idp) compat_idr_destroy(idp)
+
+static inline int idr_alloc(struct idr *idr, void *ptr, int start, int end,
+ gfp_t gfp_mask)
+{
+ int id, ret;
+
+ do {
+ if (!idr_pre_get(idr, gfp_mask))
+ return -ENOMEM;
+ ret = idr_get_new_above(idr, ptr, start, &id);
+ if (!ret && id > end) {
+ idr_remove(idr, id);
+ ret = -ENOSPC;
+ }
+ } while (ret == -EAGAIN);
+
+ return ret ? ret : id;
+}
+
+static inline void idr_preload(gfp_t gfp_mask)
+{
+}
+
+static inline void idr_preload_end(void)
+{
+}
+
+
+/**
+ * backport:
+ *
+ * commit 0bbacca7c3911451cea923b0ad6389d58e3d9ce9
+ * Author: Sasha Levin <sasha.levin@oracle.com>
+ * Date: Thu Feb 7 12:32:18 2013 +1100
+ *
+ * hlist: drop the node parameter from iterators
+ */
+
+#define hlist_entry_safe(ptr, type, member) \
+ (ptr) ? hlist_entry(ptr, type, member) : NULL
+
+#undef hlist_for_each_entry
+/**
+ * hlist_for_each_entry - iterate over list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry(pos, head, member) \
+ for (pos = hlist_entry_safe((head)->first, typeof(*(pos)), member); \
+ pos; \
+ pos = hlist_entry_safe((pos)->member.next, typeof(*(pos)), member))
+
+#undef hlist_for_each_entry_safe
+/**
+ * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos: the type * to use as a loop cursor.
+ * @n: another &struct hlist_node to use as temporary storage
+ * @head: the head for your list.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_safe(pos, n, head, member) \
+ for (pos = hlist_entry_safe((head)->first, typeof(*pos), member); \
+ pos && ({ n = pos->member.next; 1; }); \
+ pos = hlist_entry_safe(n, typeof(*pos), member))
+
+#undef hlist_for_each_entry_rcu
+/**
+ * hlist_for_each_entry_rcu - iterate over rcu list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the hlist_node within the struct.
+ *
+ * This list-traversal primitive may safely run concurrently with
+ * the _rcu list-mutation primitives such as hlist_add_head_rcu()
+ * as long as the traversal is guarded by rcu_read_lock().
+ */
+#define hlist_for_each_entry_rcu(pos, head, member) \
+ for (pos = hlist_entry_safe (rcu_dereference_raw(hlist_first_rcu(head)),\
+ typeof(*(pos)), member); \
+ pos; \
+ pos = hlist_entry_safe(rcu_dereference_raw(hlist_next_rcu( \
+ &(pos)->member)), typeof(*(pos)), member))
+
+#undef sk_for_each
+#define sk_for_each(__sk, list) \
+ hlist_for_each_entry(__sk, list, sk_node)
+
+#define tty_flip_buffer_push(port) tty_flip_buffer_push((port)->tty)
+#define tty_insert_flip_string(port, chars, size) tty_insert_flip_string((port)->tty, chars, size)
+
+/**
+ * backport of:
+ *
+ * commit 496ad9aa8ef448058e36ca7a787c61f2e63f0f54
+ * Author: Al Viro <viro@zeniv.linux.org.uk>
+ * Date: Wed Jan 23 17:07:38 2013 -0500
+ *
+ * new helper: file_inode(file)
+ */
+static inline struct inode *file_inode(struct file *f)
+{
+ return f->f_path.dentry->d_inode;
+}
+
+#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)) */
+
+#endif /* LINUX_3_9_COMPAT_H */