kernel: add linux 4.4 support

Based on 4.4-rc3. Runtime tested on MIPS.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 47701

1 files changed, 108 insertions, 0 deletions

diff --git a/target/linux/generic/patches-4.4/203-kallsyms_uncompressed.patch b/target/linux/generic/patches-4.4/203-kallsyms_uncompressed.patch
new file mode 100644
index 0000000000..cf8a447bbc
--- /dev/null
+++ b/target/linux/generic/patches-4.4/203-kallsyms_uncompressed.patch
@@ -0,0 +1,108 @@
+--- a/scripts/kallsyms.c
++++ b/scripts/kallsyms.c
+@@ -58,6 +58,7 @@ static struct addr_range percpu_range =
+ static struct sym_entry *table;
+ static unsigned int table_size, table_cnt;
+ static int all_symbols = 0;
++static int uncompressed = 0;
+ static int absolute_percpu = 0;
+ static char symbol_prefix_char = '\0';
+ static unsigned long long kernel_start_addr = 0;
+@@ -403,6 +404,9 @@ static void write_src(void)
+ 
+ 	free(markers);
+ 
++	if (uncompressed)
++		return;
++
+ 	output_label("kallsyms_token_table");
+ 	off = 0;
+ 	for (i = 0; i < 256; i++) {
+@@ -461,6 +465,9 @@ static void *find_token(unsigned char *s
+ {
+ 	int i;
+ 
++	if (uncompressed)
++		return NULL;
++
+ 	for (i = 0; i < len - 1; i++) {
+ 		if (str[i] == token[0] && str[i+1] == token[1])
+ 			return &str[i];
+@@ -533,6 +540,9 @@ static void optimize_result(void)
+ {
+ 	int i, best;
+ 
++	if (uncompressed)
++		return;
++
+ 	/* using the '\0' symbol last allows compress_symbols to use standard
+ 	 * fast string functions */
+ 	for (i = 255; i >= 0; i--) {
+@@ -703,7 +713,9 @@ int main(int argc, char **argv)
+ 			} else if (strncmp(argv[i], "--page-offset=", 14) == 0) {
+ 				const char *p = &argv[i][14];
+ 				kernel_start_addr = strtoull(p, NULL, 16);
+-			} else
++			} else if (strcmp(argv[i], "--uncompressed") == 0)
++				uncompressed = 1;
++			else
+ 				usage();
+ 		}
+ 	} else if (argc != 1)
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1345,6 +1345,17 @@ config SYSCTL_ARCH_UNALIGN_ALLOW
+ 	  the unaligned access emulation.
+ 	  see arch/parisc/kernel/unaligned.c for reference
+ 
++config KALLSYMS_UNCOMPRESSED
++	bool "Keep kallsyms uncompressed"
++	depends on KALLSYMS
++	help
++		Normally kallsyms contains compressed symbols (using a token table),
++		reducing the uncompressed kernel image size. Keeping the symbol table
++		uncompressed significantly improves the size of this part in compressed
++		kernel images.
++
++		Say N unless you need compressed kernel images to be small.
++
+ config HAVE_PCSPKR_PLATFORM
+ 	bool
+ 
+--- a/scripts/link-vmlinux.sh
++++ b/scripts/link-vmlinux.sh
+@@ -90,6 +90,10 @@ kallsyms()
+ 		kallsymopt="${kallsymopt} --absolute-percpu"
+ 	fi
+ 
++	if [ -n "${CONFIG_KALLSYMS_UNCOMPRESSED}" ]; then
++		kallsymopt="${kallsymopt} --uncompressed"
++	fi
++
+ 	local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL}               \
+ 		      ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"
+ 
+--- a/kernel/kallsyms.c
++++ b/kernel/kallsyms.c
+@@ -109,6 +109,11 @@ static unsigned int kallsyms_expand_symb
+ 	 * For every byte on the compressed symbol data, copy the table
+ 	 * entry for that byte.
+ 	 */
++#ifdef CONFIG_KALLSYMS_UNCOMPRESSED
++	memcpy(result, data + 1, len - 1);
++	result += len - 1;
++	len = 0;
++#endif
+ 	while (len) {
+ 		tptr = &kallsyms_token_table[kallsyms_token_index[*data]];
+ 		data++;
+@@ -141,6 +146,9 @@ tail:
+  */
+ static char kallsyms_get_symbol_type(unsigned int off)
+ {
++#ifdef CONFIG_KALLSYMS_UNCOMPRESSED
++	return kallsyms_names[off + 1];
++#endif
+ 	/*
+ 	 * Get just the first code, look it up in the token table,
+ 	 * and return the first char from this token.