v4.19.13 snapshot.
diff --git a/drivers/net/wireless/ath/main.c b/drivers/net/wireless/ath/main.c
new file mode 100644
index 0000000..89f4b05
--- /dev/null
+++ b/drivers/net/wireless/ath/main.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2009 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "ath.h"
+#include "trace.h"
+
+MODULE_AUTHOR("Atheros Communications");
+MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards.");
+MODULE_LICENSE("Dual BSD/GPL");
+
+struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,
+ u32 len,
+ gfp_t gfp_mask)
+{
+ struct sk_buff *skb;
+ u32 off;
+
+ /*
+ * Cache-line-align. This is important (for the
+ * 5210 at least) as not doing so causes bogus data
+ * in rx'd frames.
+ */
+
+ /* Note: the kernel can allocate a value greater than
+ * what we ask it to give us. We really only need 4 KB as that
+ * is this hardware supports and in fact we need at least 3849
+ * as that is the MAX AMSDU size this hardware supports.
+ * Unfortunately this means we may get 8 KB here from the
+ * kernel... and that is actually what is observed on some
+ * systems :( */
+ skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask);
+ if (skb != NULL) {
+ off = ((unsigned long) skb->data) % common->cachelsz;
+ if (off != 0)
+ skb_reserve(skb, common->cachelsz - off);
+ } else {
+ pr_err("skbuff alloc of size %u failed\n", len);
+ return NULL;
+ }
+
+ return skb;
+}
+EXPORT_SYMBOL(ath_rxbuf_alloc);
+
+bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr)
+{
+ return ieee80211_is_beacon(hdr->frame_control) &&
+ !is_zero_ether_addr(common->curbssid) &&
+ ether_addr_equal_64bits(hdr->addr3, common->curbssid);
+}
+EXPORT_SYMBOL(ath_is_mybeacon);
+
+void ath_printk(const char *level, const struct ath_common* common,
+ const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ if (common && common->hw && common->hw->wiphy) {
+ printk("%sath: %s: %pV",
+ level, wiphy_name(common->hw->wiphy), &vaf);
+ trace_ath_log(common->hw->wiphy, &vaf);
+ } else {
+ printk("%sath: %pV", level, &vaf);
+ }
+
+ va_end(args);
+}
+EXPORT_SYMBOL(ath_printk);
+
+const char *ath_bus_type_strings[] = {
+ [ATH_PCI] = "pci",
+ [ATH_AHB] = "ahb",
+ [ATH_USB] = "usb",
+};
+EXPORT_SYMBOL(ath_bus_type_strings);