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x86/hyperv: Fix definition of hv_ghcb_pg variable 

The percpu variable hv_ghcb_pg is incorrectly defined.  The __percpu
qualifier should be associated with the union hv_ghcb * (i.e.,
a pointer), not with the target of the pointer. This distinction
makes no difference to gcc and the generated code, but sparse
correctly complains.  Fix the definition in the interest of
general correctness in addition to making sparse happy.

No functional change.

Fixes: 0cc4f6d9f0 ("x86/hyperv: Initialize GHCB page in Isolation VM")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1640662315-22260-2-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Michael Kelley 2021-12-27 19:31:55 -08:00 committed by Wei Liu
parent db3c65bc3a
commit e1878402ab
2 changed files with 2 additions and 2 deletions
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2
arch/x86/hyperv/hv_init.c
View File

@ -37,7 +37,7 @@ EXPORT_SYMBOL_GPL(hv_current_partition_id);
void *hv_hypercall_pg;
EXPORT_SYMBOL_GPL(hv_hypercall_pg);
union hv_ghcb __percpu **hv_ghcb_pg;
union hv_ghcb * __percpu *hv_ghcb_pg;
/* Storage to save the hypercall page temporarily for hibernation */
static void *hv_hypercall_pg_saved;

2
arch/x86/include/asm/mshyperv.h
View File

@ -30,7 +30,7 @@ extern void *hv_hypercall_pg;
extern u64 hv_current_partition_id;
extern union hv_ghcb __percpu **hv_ghcb_pg;
extern union hv_ghcb * __percpu *hv_ghcb_pg;
int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages);
int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id);