Re: [Fastboot] Re: [announce] kexec for linux 2.6.6

[Andrew Morton <akpm@osdl.org>]

Christoph Hellwig <hch@infradead.org> wrote:
>
> On Thu, May 13, 2004 at 12:37:27AM -0700, Andrew Morton wrote:
> > The (old) kexec patch I have here implements the API which is described at
> > http://lwn.net/Articles/15468/.  I doubt if it changed?
> 
> That API looks sane to me.

yup.  Here's the syscall itself, btw:

+/*
+ * Exec Kernel system call: for obvious reasons only root may call it.
+ * 
+ * This call breaks up into three pieces.  
+ * - A generic part which loads the new kernel from the current
+ *   address space, and very carefully places the data in the
+ *   allocated pages.
+ *
+ * - A generic part that interacts with the kernel and tells all of
+ *   the devices to shut down.  Preventing on-going dmas, and placing
+ *   the devices in a consistent state so a later kernel can
+ *   reinitialize them.
+ *
+ * - A machine specific part that includes the syscall number
+ *   and the copies the image to it's final destination.  And
+ *   jumps into the image at entry.
+ *
+ * kexec does not sync, or unmount filesystems so if you need
+ * that to happen you need to do that yourself.
+ */
+struct kimage *kexec_image = 0;
+
+asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments, 
+	struct kexec_segment *segments, unsigned long flags)
+{

+struct kexec_segment {
+	void *buf;
+	size_t bufsz;
+	void *mem;
+	size_t memsz;
+};