Merge branch 'is_kdump_kernel'

Amir Vadai says:

====================
Make is_kdump_kernel() accessible from modules

I'm re-spinning this patchset. At the begining it was suggested to use a
different name for the parameter, but at the end [3] the resolution was to
leave it as it is in this patch.

Drivers need to know if running from kdump kernel in order to change their
memory profile - since kdump environment is limited by available memory.
Currently there are drivers that are using reset_devices as suggested in [2].
In [2] it was suggested to use reset_devices, but the context was, to enable
driver to know when the hardware device is needed to be reset, and not if this
is a kdump environment. We think that is_kdump_kernel() is better suited to
select between different memory profiles.

The first patch in this patchset exports a needed symbol in order to make
is_kdump_kernel() accessible from the drivers. The rest of the patches change
from reset_devices to is_kdump_kernel() in 2 networking drivers.

The idea of this patchset was suggested by Vivek Goyal.

Tested (only build) and applied on top of commit 8fc54f6: ("net: use
reciprocal_scale() helper")

[1] - ea1c1af: ("net/mlx4_en: Reduce memory consumption on kdump kernel")
[2] - https://lkml.org/lkml/2011/1/27/341
[3] - http://www.spinics.net/lists/netdev/msg291492.html
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 071f6b234604..783dd099abd1 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -38,6 +38,7 @@
 #include <linux/completion.h>
 #include <linux/radix-tree.h>
 #include <linux/cpu_rmap.h>
+#include <linux/crash_dump.h>
 
 #include <linux/atomic.h>
 
@@ -1275,7 +1276,7 @@ int mlx4_mr_rereg_mem_write(struct mlx4_dev *dev, struct mlx4_mr *mr,
 /* Returns true if running in low memory profile (kdump kernel) */
 static inline bool mlx4_low_memory_profile(void)
 {
-	return reset_devices;
+	return is_kdump_kernel();
 }
 
 #endif /* MLX4_DEVICE_H */