Commit 8bb9bf24 authored by Joerg Roedel's avatar Joerg Roedel Committed by Ingo Molnar
Browse files

x86/mm/64: Do not sync vmalloc/ioremap mappings 



Remove the code to sync the vmalloc and ioremap ranges for x86-64. The
page-table pages are all pre-allocated now so that synchronization is
no longer necessary.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Reviewed-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/20200721095953.6218-3-joro@8bytes.org
parent 6eb82f99

arch/x86/include/asm/pgtable_64_types.h

+0 −2
Original line number Diff line number Diff line
@@ -159,6 +159,4 @@ extern unsigned int ptrs_per_p4d; 


#define PGD_KERNEL_START	((PAGE_SIZE / 2) / sizeof(pgd_t))



#define ARCH_PAGE_TABLE_SYNC_MASK	(pgtable_l5_enabled() ?	PGTBL_PGD_MODIFIED : PGTBL_P4D_MODIFIED)



#endif /* _ASM_X86_PGTABLE_64_DEFS_H */

arch/x86/mm/init_64.c

+0 −5
Original line number Diff line number Diff line
@@ -217,11 +217,6 @@ void sync_global_pgds(unsigned long start, unsigned long end) 
		sync_global_pgds_l4(start, end);

}



void arch_sync_kernel_mappings(unsigned long start, unsigned long end)

{

	sync_global_pgds(start, end);

}



/*

 * NOTE: This function is marked __ref because it calls __init function

 * (alloc_bootmem_pages). It's safe to do it ONLY when after_bootmem == 0.

CRA Git | Maintained and supported by SUSTech CRA and CCSE