kernel: update to 4.5.3

4 files changed, 203 insertions, 0 deletions

diff --git a/target/linux/patches/4.5.3/coldfire-sighandler.patch b/target/linux/patches/4.5.3/coldfire-sighandler.patch
new file mode 100644
index 000000000..c52a4e228
--- /dev/null
+++ b/target/linux/patches/4.5.3/coldfire-sighandler.patch
@@ -0,0 +1,100 @@
+From a95517992a37488c0bc8b629c47c570e580e407d Mon Sep 17 00:00:00 2001
+From: Greg Ungerer <gerg@uclinux.org>
+Date: Mon, 15 Feb 2016 16:36:29 +1000
+Subject: m68k: Use conventional function parameters for do_sigreturn
+
+Create conventional stack parameters for the calls to do_sigreturn and
+do_rt_sigreturn. The current C code for do_sigreturn and do_rt_sigreturn
+dig into the stack to create local pointers to the saved switch stack
+and the pt_regs structs.
+
+The motivation for this change is a problem with non-MMU targets that
+have broken signal return paths on newer versions of gcc. It appears as
+though gcc has determined that the pointers into the saved stack structs,
+and the saved structs themselves, are function parameters and updates to
+them will be lost on function return, so they are optimized away. This
+results in large parts of restore_sigcontext() and mangle_kernel_stack()
+functions being removed. Of course this results in non-functional code
+causing kernel oops. This problem has been observed with gcc version
+5.2 and 5.3, and probably exists in earlier versions as well.
+
+Using conventional stack parameter pointers passed to these functions has
+the advantage of the code here not needing to know the exact details of
+how the underlying entry handler layed these structs out on the stack.
+So the rather ugly pointer setup casting and arg referencing can be
+removed.
+
+The resulting code after this change is a few bytes larger (due to the
+overhead of creating the stack args and their tear down). Not being hot
+paths I don't think this is too much of a problem here.
+
+An alternative solution is to put a barrier() in the do_sigreturn() code,
+but this doesn't feel quite as clean as this solution.
+
+This change has been compile tested on all defconfigs, and run tested on
+Atari (through aranym), ColdFire with MMU (M5407EVB) and ColdFire with
+no-MMU (QEMU and M5208EVB).
+
+Signed-off-by: Greg Ungerer <gerg@uclinux.org>
+Acked-by: Andreas Schwab <schwab@linux-m68k.org>
+Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
+---
+ arch/m68k/kernel/entry.S  | 6 ++++++
+ arch/m68k/kernel/signal.c | 8 ++------
+ 2 files changed, 8 insertions(+), 6 deletions(-)
+
+diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
+index b54ac7a..97cd3ea 100644
+--- a/arch/m68k/kernel/entry.S
++++ b/arch/m68k/kernel/entry.S
+@@ -71,13 +71,19 @@ ENTRY(__sys_vfork)
+ 
+ ENTRY(sys_sigreturn)
+ 	SAVE_SWITCH_STACK
++	movel	%sp,%sp@-		  | switch_stack pointer
++	pea	%sp@(SWITCH_STACK_SIZE+4) | pt_regs pointer
+ 	jbsr	do_sigreturn
++	addql	#8,%sp
+ 	RESTORE_SWITCH_STACK
+ 	rts
+ 
+ ENTRY(sys_rt_sigreturn)
+ 	SAVE_SWITCH_STACK
++	movel	%sp,%sp@-		  | switch_stack pointer
++	pea	%sp@(SWITCH_STACK_SIZE+4) | pt_regs pointer
+ 	jbsr	do_rt_sigreturn
++	addql	#8,%sp
+ 	RESTORE_SWITCH_STACK
+ 	rts
+ 
+diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
+index af1c4f3..2dcee3a 100644
+--- a/arch/m68k/kernel/signal.c
++++ b/arch/m68k/kernel/signal.c
+@@ -737,10 +737,8 @@ badframe:
+ 	return 1;
+ }
+ 
+-asmlinkage int do_sigreturn(unsigned long __unused)
++asmlinkage int do_sigreturn(struct pt_regs *regs, struct switch_stack *sw)
+ {
+-	struct switch_stack *sw = (struct switch_stack *) &__unused;
+-	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
+ 	unsigned long usp = rdusp();
+ 	struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
+ 	sigset_t set;
+@@ -764,10 +762,8 @@ badframe:
+ 	return 0;
+ }
+ 
+-asmlinkage int do_rt_sigreturn(unsigned long __unused)
++asmlinkage int do_rt_sigreturn(struct pt_regs *regs, struct switch_stack *sw)
+ {
+-	struct switch_stack *sw = (struct switch_stack *) &__unused;
+-	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
+ 	unsigned long usp = rdusp();
+ 	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
+ 	sigset_t set;
+-- 
+cgit v0.12
+
diff --git a/target/linux/patches/4.5.3/initramfs-nosizelimit.patch b/target/linux/patches/4.5.3/initramfs-nosizelimit.patch
new file mode 100644
index 000000000..40d2f6bd8
--- /dev/null
+++ b/target/linux/patches/4.5.3/initramfs-nosizelimit.patch
@@ -0,0 +1,57 @@
+From 9a18df7a71bfa620b1278777d64783a359d7eb4e Mon Sep 17 00:00:00 2001
+From: Thorsten Glaser <tg@mirbsd.org>
+Date: Sun, 4 May 2014 01:37:54 +0200
+Subject: [PATCH] mount tmpfs-as-rootfs (initramfs) with -o
+ nr_blocks=0,nr_inodes=0
+
+I would have preferred to write this patch to be able to pass
+rootflags=nr_blocks=0,nr_inodes=0 on the kernel command line,
+and then hand these rootflags over to the initramfs (tmpfs)
+mount in the same way the kernel hands them over to the block
+device rootfs mount. But at least the Debian/m68k initrd also
+parses $rootflags from the environment and adds it to the call
+to the user-space mount for the eventual root device, which
+would make the kernel command line rootflags option be used in
+both places (tmpfs and e.g. ext4) which is guaranteed to error
+out in at least one of them.
+
+This change is intended to aid people in a setup where the
+initrd is the final root filesystem, i.e. not mounted over.
+This is especially useful in automated tests running on qemu
+for boards with constrained memory (e.g. 64 MiB on sh4).
+
+Considering that the initramfs is normally emptied out then
+overmounted, this change is probably safe for setups where
+initramfs just hosts early userspace, too, since the tmpfs
+backing it is not accessible any more later on, AFAICT.
+
+Signed-off-by: Thorsten Glaser <tg@mirbsd.org>
+---
+ init/do_mounts.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/init/do_mounts.c b/init/do_mounts.c
+index 82f2288..55a4cfe 100644
+--- a/init/do_mounts.c
++++ b/init/do_mounts.c
+@@ -594,6 +594,7 @@ out:
+ }
+ 
+ static bool is_tmpfs;
++static char tmpfs_rootflags[] = "nr_blocks=0,nr_inodes=0";
+ static struct dentry *rootfs_mount(struct file_system_type *fs_type,
+ 	int flags, const char *dev_name, void *data)
+ {
+@@ -606,6 +607,9 @@ static struct dentry *rootfs_mount(struct file_system_type *fs_type,
+ 	if (IS_ENABLED(CONFIG_TMPFS) && is_tmpfs)
+ 		fill = shmem_fill_super;
+ 
++	if (is_tmpfs)
++		data = tmpfs_rootflags;
++
+ 	return mount_nodev(fs_type, flags, data, fill);
+ }
+ 
+-- 
+2.0.0.rc0
+
diff --git a/target/linux/patches/4.5.3/ld-or1k.patch b/target/linux/patches/4.5.3/ld-or1k.patch
new file mode 100644
index 000000000..264f9166f
--- /dev/null
+++ b/target/linux/patches/4.5.3/ld-or1k.patch
@@ -0,0 +1,12 @@
+diff -Nur linux-4.4.5.orig/arch/openrisc/kernel/vmlinux.lds.S linux-4.4.5/arch/openrisc/kernel/vmlinux.lds.S
+--- linux-4.4.5.orig/arch/openrisc/kernel/vmlinux.lds.S	2016-03-10 00:35:58.000000000 +0100
++++ linux-4.4.5/arch/openrisc/kernel/vmlinux.lds.S	2016-03-16 09:21:07.933535532 +0100
+@@ -30,7 +30,7 @@
+ #include <asm/cache.h>
+ #include <asm-generic/vmlinux.lds.h>
+ 
+-OUTPUT_FORMAT("elf32-or32", "elf32-or32", "elf32-or32")
++OUTPUT_FORMAT("elf32-or1k", "elf32-or1k", "elf32-or1k")
+ jiffies = jiffies_64 + 4;
+ 
+ SECTIONS
diff --git a/target/linux/patches/4.5.3/startup.patch b/target/linux/patches/4.5.3/startup.patch
new file mode 100644
index 000000000..e54ac19a6
--- /dev/null
+++ b/target/linux/patches/4.5.3/startup.patch
@@ -0,0 +1,34 @@
+diff -Nur linux-4.4.6.orig/init/initramfs.c linux-4.4.6/init/initramfs.c
+--- linux-4.4.6.orig/init/initramfs.c	2016-03-16 16:43:17.000000000 +0100
++++ linux-4.4.6/init/initramfs.c	2016-03-27 14:15:43.931044532 +0200
+@@ -653,6 +653,9 @@
+ 		 */
+ 		load_default_modules();
+ 	}
++#ifdef CONFIG_DEVTMPFS_MOUNT
++	devtmpfs_mount("dev");
++#endif
+ 	return 0;
+ }
+ rootfs_initcall(populate_rootfs);
+diff -Nur linux-4.4.6.orig/init/main.c linux-4.4.6/init/main.c
+--- linux-4.4.6.orig/init/main.c	2016-03-16 16:43:17.000000000 +0100
++++ linux-4.4.6/init/main.c	2016-03-27 14:15:43.935044783 +0200
+@@ -1011,6 +1011,8 @@
+ 	if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
+ 		pr_err("Warning: unable to open an initial console.\n");
+ 
++	printk(KERN_WARNING "Starting Linux (built with OpenADK).\n");
++
+ 	(void) sys_dup(0);
+ 	(void) sys_dup(0);
+ 	/*
+@@ -1019,7 +1021,7 @@
+ 	 */
+ 
+ 	if (!ramdisk_execute_command)
+-		ramdisk_execute_command = "/init";
++		ramdisk_execute_command = "/sbin/init";
+ 
+ 	if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {
+ 		ramdisk_execute_command = NULL;