Merge branch 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev

[linux-2.6-omap-h63xx.git] / kernel / crash_dump.c

diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c
index 459ba49e376a289f3f82043f23e8694ef43e9cb8..334c37f5218aa39a2f7851a73181f01b401539b8 100644 (file)
--- a/kernel/crash_dump.c
+++ b/kernel/crash_dump.c
@@ -18,7 +18,16 @@
 /* Stores the physical address of elf header of crash image. */
 unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
 
-/*
+/**
+ * copy_oldmem_page - copy one page from "oldmem"
+ * @pfn: page frame number to be copied
+ * @buf: target memory address for the copy; this can be in kernel address
+ *     space or user address space (see @userbuf)
+ * @csize: number of bytes to copy
+ * @offset: offset in bytes into the page (based on pfn) to begin the copy
+ * @userbuf: if set, @buf is in user address space, use copy_to_user(),
+ *     otherwise @buf is in kernel address space, use memcpy().
+ *
  * Copy a page from "oldmem". For this page, there is no pte mapped
  * in the current kernel. We stitch up a pte, similar to kmap_atomic.
  */