arm64/mm: Rename try_pgd_pgtable_alloc_init_mm

With BUG_ON in pgd_pgtable_alloc_init_mm moved up to higher layer,
gfp flags is the only difference between try_pgd_pgtable_alloc_init_mm
and pgd_pgtable_alloc_init_mm. Hence rename the "try" version
to pgd_pgtable_alloc_init_mm_gfp.

Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Signed-off-by: Linu Cherian <linu.cherian@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Author: Linu Cherian

arch/arm64/mm/mmu.c

@@ -560,15 +560,15 @@ static phys_addr_t __pgd_pgtable_alloc(struct mm_struct *mm, gfp_t gfp,
 }
 
 static phys_addr_t
-try_pgd_pgtable_alloc_init_mm(enum pgtable_type pgtable_type, gfp_t gfp)
+pgd_pgtable_alloc_init_mm_gfp(enum pgtable_type pgtable_type, gfp_t gfp)
 {
 	return __pgd_pgtable_alloc(&init_mm, gfp, pgtable_type);
 }
 
 static phys_addr_t __maybe_unused
 pgd_pgtable_alloc_init_mm(enum pgtable_type pgtable_type)
 {
-	return __pgd_pgtable_alloc(&init_mm, GFP_PGTABLE_KERNEL, pgtable_type);
+	return pgd_pgtable_alloc_init_mm_gfp(pgtable_type, GFP_PGTABLE_KERNEL);
 }
 
 static phys_addr_t
@@ -595,7 +595,7 @@ static int split_pmd(pmd_t *pmdp, pmd_t pmd, gfp_t gfp, bool to_cont)
 	pte_t *ptep;
 	int i;
 
-	pte_phys = try_pgd_pgtable_alloc_init_mm(TABLE_PTE, gfp);
+	pte_phys = pgd_pgtable_alloc_init_mm_gfp(TABLE_PTE, gfp);
 	if (pte_phys == INVALID_PHYS_ADDR)
 		return -ENOMEM;
 	ptep = (pte_t *)phys_to_virt(pte_phys);
@@ -640,7 +640,7 @@ static int split_pud(pud_t *pudp, pud_t pud, gfp_t gfp, bool to_cont)
 	pmd_t *pmdp;
 	int i;
 
-	pmd_phys = try_pgd_pgtable_alloc_init_mm(TABLE_PMD, gfp);
+	pmd_phys = pgd_pgtable_alloc_init_mm_gfp(TABLE_PMD, gfp);
 	if (pmd_phys == INVALID_PHYS_ADDR)
 		return -ENOMEM;
 	pmdp = (pmd_t *)phys_to_virt(pmd_phys);