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Subject[PATCH 3/4] xen/mmu: The xen_setup_kernel_pagetable doesn't need to return anything.
Date
We don't need to return the new PGD - as we do not use it.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
arch/x86/xen/enlighten.c | 5 +----
arch/x86/xen/mmu.c | 10 ++--------
arch/x86/xen/xen-ops.h | 2 +-
3 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 9b1afa4..2b67948 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1295,7 +1295,6 @@ asmlinkage void __init xen_start_kernel(void)
{
struct physdev_set_iopl set_iopl;
int rc;
- pgd_t *pgd;

if (!xen_start_info)
return;
@@ -1387,8 +1386,6 @@ asmlinkage void __init xen_start_kernel(void)
acpi_numa = -1;
#endif

- pgd = (pgd_t *)xen_start_info->pt_base;
-
/* Don't do the full vcpu_info placement stuff until we have a
possible map and a non-dummy shared_info. */
per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
@@ -1397,7 +1394,7 @@ asmlinkage void __init xen_start_kernel(void)
early_boot_irqs_disabled = true;

xen_raw_console_write("mapping kernel into physical memory\n");
- pgd = xen_setup_kernel_pagetable(pgd, xen_start_info->nr_pages);
+ xen_setup_kernel_pagetable((pgd_t *)xen_start_info->pt_base, xen_start_info->nr_pages);

xen_reserve_internals();
/* Allocate and initialize top and mid mfn levels for p2m structure */
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 3a73785..4ac21a4 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1719,8 +1719,7 @@ static void convert_pfn_mfn(void *v)
* of the physical mapping once some sort of allocator has been set
* up.
*/
-pgd_t * __init xen_setup_kernel_pagetable(pgd_t *pgd,
- unsigned long max_pfn)
+void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn)
{
pud_t *l3;
pmd_t *l2;
@@ -1781,8 +1780,6 @@ pgd_t * __init xen_setup_kernel_pagetable(pgd_t *pgd,

memblock_reserve(__pa(xen_start_info->pt_base),
xen_start_info->nr_pt_frames * PAGE_SIZE);
-
- return pgd;
}
#else /* !CONFIG_X86_64 */
static RESERVE_BRK_ARRAY(pmd_t, initial_kernel_pmd, PTRS_PER_PMD);
@@ -1825,8 +1822,7 @@ static void __init xen_write_cr3_init(unsigned long cr3)
pv_mmu_ops.write_cr3 = &xen_write_cr3;
}

-pgd_t * __init xen_setup_kernel_pagetable(pgd_t *pgd,
- unsigned long max_pfn)
+void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn)
{
pmd_t *kernel_pmd;

@@ -1858,8 +1854,6 @@ pgd_t * __init xen_setup_kernel_pagetable(pgd_t *pgd,

memblock_reserve(__pa(xen_start_info->pt_base),
xen_start_info->nr_pt_frames * PAGE_SIZE);
-
- return initial_page_table;
}
#endif /* CONFIG_X86_64 */

diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 202d4c1..2230f57 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -27,7 +27,7 @@ void xen_setup_mfn_list_list(void);
void xen_setup_shared_info(void);
void xen_build_mfn_list_list(void);
void xen_setup_machphys_mapping(void);
-pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn);
+void xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn);
void xen_reserve_top(void);
extern unsigned long xen_max_p2m_pfn;

--
1.7.7.6


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