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powerpc: inline huge vmap supported functions 

This allows unsupported levels to be constant folded away, and so
p4d_free_pud_page can be removed because it's no longer linked to.

Link: https://lkml.kernel.org/r/20210317062402.533919-8-npiggin@gmail.com
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ding Tianhong <dingtianhong@huawei.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nicholas Piggin 2021-04-29 22:58:30 -07:00 committed by Linus Torvalds
parent bbc180a5ad
commit 8309c9d717
2 changed files with 16 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/powerpc/include/asm/vmalloc.h
View File

@ -1,12 +1,25 @@
#ifndef _ASM_POWERPC_VMALLOC_H
#define _ASM_POWERPC_VMALLOC_H
#include <asm/mmu.h>
#include <asm/page.h>
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
bool arch_vmap_p4d_supported(pgprot_t prot);
bool arch_vmap_pud_supported(pgprot_t prot);
bool arch_vmap_pmd_supported(pgprot_t prot);
static inline bool arch_vmap_p4d_supported(pgprot_t prot)
{
return false;
}
static inline bool arch_vmap_pud_supported(pgprot_t prot)
{
/* HPT does not cope with large pages in the vmalloc area */
return radix_enabled();
}
static inline bool arch_vmap_pmd_supported(pgprot_t prot)
{
return radix_enabled();
}
#endif
#endif /* _ASM_POWERPC_VMALLOC_H */

21
arch/powerpc/mm/book3s64/radix_pgtable.c
View File

@ -1082,22 +1082,6 @@ void radix__ptep_modify_prot_commit(struct vm_area_struct *vma,
set_pte_at(mm, addr, ptep, pte);
}
bool arch_vmap_pud_supported(pgprot_t prot)
{
/* HPT does not cope with large pages in the vmalloc area */
return radix_enabled();
}
bool arch_vmap_pmd_supported(pgprot_t prot)
{
return radix_enabled();
}
int p4d_free_pud_page(p4d_t *p4d, unsigned long addr)
{
return 0;
}
int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
{
pte_t *ptep = (pte_t *)pud;
@ -1181,8 +1165,3 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
return 1;
}
bool arch_vmap_p4d_supported(pgprot_t prot)
{
return false;
}