--- Begin Message ---
- Subject: No Subject
- From:
- Date: Mon, 28 Mar 2005 17:49:54 +0530
From: "Vivek Goyal" <[email protected]>
o Enable copy_oldmem_page() to read from a specific offset, with in a page.
Signed-off-by: Vivek Goyal <[email protected]>
---
linux-2.6.12-rc1-mm1-1M-root/include/linux/crash_dump.h | 3 ++-
linux-2.6.12-rc1-mm1-1M-root/kernel/crash_dump.c | 10 +++++-----
2 files changed, 7 insertions(+), 6 deletions(-)
diff -puN include/linux/crash_dump.h~crashdump-routines-for-copying-dump-pages-more-fixes include/linux/crash_dump.h
--- linux-2.6.12-rc1-mm1-1M/include/linux/crash_dump.h~crashdump-routines-for-copying-dump-pages-more-fixes 2005-03-22 16:15:55.000000000 +0530
+++ linux-2.6.12-rc1-mm1-1M-root/include/linux/crash_dump.h 2005-03-22 16:15:55.000000000 +0530
@@ -7,6 +7,7 @@
#include <linux/device.h>
#include <linux/proc_fs.h>
-extern ssize_t copy_oldmem_page(unsigned long, char *, size_t, int);
+extern ssize_t copy_oldmem_page(unsigned long, char *, size_t,
+ unsigned long, int);
#endif /* CONFIG_CRASH_DUMP */
#endif /* LINUX_CRASHDUMP_H */
diff -puN kernel/crash_dump.c~crashdump-routines-for-copying-dump-pages-more-fixes kernel/crash_dump.c
--- linux-2.6.12-rc1-mm1-1M/kernel/crash_dump.c~crashdump-routines-for-copying-dump-pages-more-fixes 2005-03-22 16:15:55.000000000 +0530
+++ linux-2.6.12-rc1-mm1-1M-root/kernel/crash_dump.c 2005-03-22 16:15:55.000000000 +0530
@@ -20,7 +20,7 @@
* in the current kernel. We stitch up a pte, similar to kmap_atomic.
*/
ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
- size_t csize, int userbuf)
+ size_t csize, unsigned long offset, int userbuf)
{
void *page, *vaddr;
@@ -36,14 +36,14 @@ ssize_t copy_oldmem_page(unsigned long p
kunmap_atomic(vaddr, KM_PTE0);
if (userbuf) {
- if (copy_to_user(buf, page, csize)) {
+ if (copy_to_user(buf, (page + offset), csize)) {
kfree(page);
return -EFAULT;
}
} else {
- memcpy(buf, page, csize);
+ memcpy(buf, (page + offset), csize);
}
- kfree(page);
- return 0;
+ kfree(page);
+ return csize;
}
_
--- End Message ---
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