linux-toradex.git/kernel/kexec.c, branch v3.10.2

kexec: Use min() and min_t() to simplify logic

2013-05-01T00:04:07+00:00

Simplify the logic of variable assignments.

[akpm@linux-foundation.org: replace min_t with min, remove unneeded casts]
Signed-off-by: Zhang Yanfei 
Cc: "Eric W. Biederman" 
Reviewed-by: Simon Horman 
Cc: Joe Perches 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kexec: fix wrong types of some local variables

2013-05-01T00:04:07+00:00

The types of the following local variables:

- ubytes/mbytes in kimage_load_crash_segment()/kimage_load_normal_segment()

- r in vmcoreinfo_append_str()

are wrong, so fix them.

Signed-off-by: Zhang Yanfei 
Cc: "Eric W. Biederman" 
Cc: Simon Horman 
Cc: Joe Perches 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kexec, vmalloc: export additional vmalloc layer information

2013-04-29T22:54:34+00:00

Now, vmap_area_list is exported as VMCOREINFO for makedumpfile to get
the start address of vmalloc region (vmalloc_start).  The address which
contains vmalloc_start value is represented as below:

  vmap_area_list.next - OFFSET(vmap_area.list) + OFFSET(vmap_area.va_start)

However, both OFFSET(vmap_area.va_start) and OFFSET(vmap_area.list)
aren't exported as VMCOREINFO.

So this patch exports them externally with small cleanup.

[akpm@linux-foundation.org: vmalloc.h should include list.h for list_head]
Signed-off-by: Atsushi Kumagai 
Cc: Joonsoo Kim 
Cc: Joonsoo Kim 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Cc: Atsushi Kumagai 
Cc: Chris Metcalf 
Cc: Dave Anderson 
Cc: Eric Biederman 
Cc: Guan Xuetao 
Cc: Ingo Molnar 
Cc: Vivek Goyal 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm, vmalloc: export vmap_area_list, instead of vmlist

2013-04-29T22:54:34+00:00

Although our intention is to unexport internal structure entirely, but
there is one exception for kexec.  kexec dumps address of vmlist and
makedumpfile uses this information.

We are about to remove vmlist, then another way to retrieve information
of vmalloc layer is needed for makedumpfile.  For this purpose, we
export vmap_area_list, instead of vmlist.

Signed-off-by: Joonsoo Kim 
Signed-off-by: Joonsoo Kim 
Cc: Eric Biederman 
Cc: Dave Anderson 
Cc: Vivek Goyal 
Cc: Atsushi Kumagai 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Cc: Chris Metcalf 
Cc: Guan Xuetao 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm,kexec: use common help functions to free reserved pages

2013-04-29T22:54:31+00:00

Use common help functions to free reserved pages.

Signed-off-by: Jiang Liu 
Cc: Eric Biederman 
Reviewed-by: Zhang Yanfei 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kexec: use Crash kernel for Crash kernel low

2013-04-17T19:35:34+00:00

We can extend kexec-tools to support multiple "Crash kernel" in /proc/iomem
instead.

So we can use "Crash kernel" instead of "Crash kernel low" in /proc/iomem.

Suggested-by: Vivek Goyal 
Signed-off-by: Yinghai Lu 
Link: http://lkml.kernel.org/r/1366089828-19692-3-git-send-email-yinghai@kernel.org
Acked-by: Vivek Goyal 
Signed-off-by: H. Peter Anvin

x86, kdump: Change crashkernel_high/low= to crashkernel=,high/low

2013-04-17T19:35:33+00:00

Per hpa, use crashkernel=X,high crashkernel=Y,low instead of
crashkernel_hign=X crashkernel_low=Y. As that could be extensible.

-v2: according to Vivek, change delimiter to ;
-v3: let hign and low only handle simple form and it conforms to
	description in kernel-parameters.txt
     still keep crashkernel=X override any crashkernel=X,high
        crashkernel=Y,low
-v4: update get_last_crashkernel returning and add more strict
     checking in parse_crashkernel_simple() found by HATAYAMA.
-v5: Change delimiter back to , according to HPA.
     also separate parse_suffix from parse_simper according to vivek.
	so we can avoid @pos in that path.
-v6: Tight the checking about crashkernel=X,highblahblah,high
     found by HTYAYAMA.

Cc: HATAYAMA Daisuke 
Signed-off-by: Yinghai Lu 
Link: http://lkml.kernel.org/r/1366089828-19692-5-git-send-email-yinghai@kernel.org
Acked-by: Vivek Goyal 
Signed-off-by: H. Peter Anvin

x86, kdump: Retore crashkernel= to allocate under 896M

2013-04-17T19:35:33+00:00

Vivek found old kexec-tools does not work new kernel anymore.

So change back crashkernel= back to old behavoir, and add crashkernel_high=
to let user decide if buffer could be above 4G, and also new kexec-tools will
be needed.

-v2: let crashkernel=X override crashkernel_high=
    update description about _high will be ignored by crashkernel=X
-v3: update description about kernel-parameters.txt according to Vivek.

Signed-off-by: Yinghai Lu 
Link: http://lkml.kernel.org/r/1366089828-19692-4-git-send-email-yinghai@kernel.org
Acked-by: Vivek Goyal 
Signed-off-by: H. Peter Anvin

kexec: avoid freeing NULL pointer in image_crash_alloc()

2013-02-28T03:10:12+00:00

Though there is no error if we free a NULL pointer, I think we could
avoid this behaviour.  Change the code a little in kimage_crash_alloc()
could avoid this kind of unnecessary free.

Signed-off-by: Zhang Yanfei 
Cc: "Eric W. Biederman" 
Cc: Sasha Levin 
Reviewed-by: Simon Horman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kexec: fix memory leak in function kimage_normal_alloc

2013-02-28T03:10:12+00:00

If kimage_normal_alloc() fails to alloc pages for image->swap_page, it
should call kimage_free_page_list() to free allocated pages in
image->control_pages list before it frees image.

Signed-off-by: Zhang Yanfei 
Cc: "Eric W. Biederman" 
Cc: Sasha Levin 
Reviewed-by: Simon Horman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds