brcm47xx: Add support for kernel 4.9

I tested this on a WRT54GS and a WRT610N V1.
The WRT610N does not boot when the kernel is too big, so I deactivated KALLSYMS

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 34 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-4.9/400-mtd-bcm47xxpart-get-nvram.patch b/target/linux/brcm47xx/patches-4.9/400-mtd-bcm47xxpart-get-nvram.patch
new file mode 100644
index 0000000000..7e4ae20704
--- /dev/null
+++ b/target/linux/brcm47xx/patches-4.9/400-mtd-bcm47xxpart-get-nvram.patch
@@ -0,0 +1,34 @@
+--- a/drivers/mtd/bcm47xxpart.c
++++ b/drivers/mtd/bcm47xxpart.c
+@@ -102,6 +102,7 @@ static int bcm47xxpart_parse(struct mtd_
+ 	int trx_num = 0; /* Number of found TRX partitions */
+ 	int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
+ 	int err;
++	bool found_nvram = false;
+ 
+ 	/*
+ 	 * Some really old flashes (like AT45DB*) had smaller erasesize-s, but
+@@ -269,12 +270,23 @@ static int bcm47xxpart_parse(struct mtd_
+ 		if (buf[0] == NVRAM_HEADER) {
+ 			bcm47xxpart_add_part(&parts[curr_part++], "nvram",
+ 					     master->size - blocksize, 0);
++			found_nvram = true;
+ 			break;
+ 		}
+ 	}
+ 
+ 	kfree(buf);
+ 
++	if (!found_nvram) {
++		pr_err("can not find a nvram partition reserve last block\n");
++		bcm47xxpart_add_part(&parts[curr_part++], "nvram_guess",
++				     master->size - blocksize * 2, MTD_WRITEABLE);
++		for (i = 0; i < curr_part; i++) {
++			if (parts[i].size + parts[i].offset == master->size)
++				parts[i].offset -= blocksize * 2;
++		}
++	}
++
+ 	/*
+ 	 * Assume that partitions end at the beginning of the one they are
+ 	 * followed by.