x86/hyperv: Remove BUG_ON() for kmap_local_page()

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The commit 154fb14df7 ("x86/hyperv: Replace kmap() with
kmap_local_page()") keeps the BUG_ON() to check if kmap_local_page()
fails.

But in fact, kmap_local_page() always returns a valid kernel address
and won't return NULL here. It will BUG on its own if it fails. [1]

So directly use memcpy_to_page() which creates local mapping to copy.

[1]: https://lore.kernel.org/lkml/YztFEyUA48et0yTt@iweiny-mobl/

Suggested-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Suggested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20221020083820.2341088-1-zhao1.liu@linux.intel.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

...

This commit is contained in:

Zhao Liu 2022-10-20 16:38:20 +08:00 • committed by Wei Liu

parent 247f34f7b8

commit 03b9a6e18d

1 changed files with 3 additions and 5 deletions

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arch/x86/hyperv/hv_init.c

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