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Commit 5372e155 authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Thomas Gleixner
Browse files

x86/mm: Drop unused argument 'removed' from sync_global_pgds() 



Since commit af2cf278 ("x86/mm/hotplug: Don't remove PGD entries in
remove_pagetable()") there are no callers of sync_global_pgds() which set
the 'removed' argument to 1.

Remove the argument and the related conditionals in the function.

Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Link: http://lkml.kernel.org/r/20161214234403.137556-1-kirill.shutemov@linux.intel.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent aec03f89

arch/x86/include/asm/pgtable_64.h

+1 −2
Original line number Diff line number Diff line
@@ -116,8 +116,7 @@ static inline void native_pgd_clear(pgd_t *pgd) 
	native_set_pgd(pgd, native_make_pgd(0));

}



extern void sync_global_pgds(unsigned long start, unsigned long end,

			     int removed);

extern void sync_global_pgds(unsigned long start, unsigned long end);



/*

 * Conversion functions: convert a page and protection to a page entry,

arch/x86/mm/fault.c

+1 −1
Original line number Diff line number Diff line
@@ -413,7 +413,7 @@ static void dump_pagetable(unsigned long address) 


void vmalloc_sync_all(void)

{

	sync_global_pgds(VMALLOC_START & PGDIR_MASK, VMALLOC_END, 0);

	sync_global_pgds(VMALLOC_START & PGDIR_MASK, VMALLOC_END);

}



/*

arch/x86/mm/init_64.c

+7 −17
Original line number Diff line number Diff line
@@ -89,10 +89,10 @@ static int __init nonx32_setup(char *str) 
__setup("noexec32=", nonx32_setup);



/*

 * When memory was added/removed make sure all the processes MM have

 * When memory was added make sure all the processes MM have

 * suitable PGD entries in the local PGD level page.

 */

void sync_global_pgds(unsigned long start, unsigned long end, int removed)

void sync_global_pgds(unsigned long start, unsigned long end)

{

	unsigned long address;
@@ -100,12 +100,7 @@ void sync_global_pgds(unsigned long start, unsigned long end, int removed) 
		const pgd_t *pgd_ref = pgd_offset_k(address);

		struct page *page;



		/*

		 * When it is called after memory hot remove, pgd_none()

		 * returns true. In this case (removed == 1), we must clear

		 * the PGD entries in the local PGD level page.

		 */

		if (pgd_none(*pgd_ref) && !removed)

		if (pgd_none(*pgd_ref))

			continue;



		spin_lock(&pgd_lock);
@@ -122,13 +117,8 @@ void sync_global_pgds(unsigned long start, unsigned long end, int removed) 
				BUG_ON(pgd_page_vaddr(*pgd)

				       != pgd_page_vaddr(*pgd_ref));



			if (removed) {

				if (pgd_none(*pgd_ref) && !pgd_none(*pgd))

					pgd_clear(pgd);

			} else {

			if (pgd_none(*pgd))

				set_pgd(pgd, *pgd_ref);

			}



			spin_unlock(pgt_lock);

		}
@@ -596,7 +586,7 @@ kernel_physical_mapping_init(unsigned long paddr_start, 
	}



	if (pgd_changed)

		sync_global_pgds(vaddr_start, vaddr_end - 1, 0);

		sync_global_pgds(vaddr_start, vaddr_end - 1);



	__flush_tlb_all();
@@ -1239,7 +1229,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node) 
	} else

		err = vmemmap_populate_basepages(start, end, node);

	if (!err)

		sync_global_pgds(start, end - 1, 0);

		sync_global_pgds(start, end - 1);

	return err;

}