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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2015-08-02 01:08:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-05 07:25:29 +0200 |
| commit | d7646eaa7678fe5adc42247b4bdfbe9d9db8c253 (patch) | |
| tree | 3f8aa489b8aa7cf247aaf5fc306877b8332ffbfb /arch/x86/kernel/cpu/mshyperv.c | |
| parent | Drivers: hv: vmbus: add special kexec handler (diff) | |
| download | linux-d7646eaa7678fe5adc42247b4bdfbe9d9db8c253.tar.xz linux-d7646eaa7678fe5adc42247b4bdfbe9d9db8c253.zip | |
Drivers: hv: don't do hypercalls when hypercall_page is NULL
At the very late stage of kexec a driver (which are not being unloaded) can
try to post a message or signal an event. This will crash the kernel as we
already did hv_cleanup() and the hypercall page is NULL.
Move all common (between 32 and 64 bit code) declarations to the beginning
of the do_hypercall() function. Unfortunately we have to write the
!hypercall_page check twice to not mix declarations and code.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/cpu/mshyperv.c')
0 files changed, 0 insertions, 0 deletions