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From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <peterz@infradead.org>
Cc: Linux-Next Mailing List <linux-next@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Pavel Tatashin <pasha.tatashin@oracle.com>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: linux-next: manual merge of the akpm-current tree with the tip tree
Date: Thu, 2 Nov 2017 18:19:14 +1100
Message-ID: <20171102181914.3121e876@canb.auug.org.au> (raw)

Hi Andrew,

Today's linux-next merge of the akpm-current tree got a conflict in:

  arch/x86/mm/kasan_init_64.c

between commit:

  12a8cc7fcf54 ("x86/kasan: Use the same shadow offset for 4- and 5-level paging")

from the tip tree and commit:

  3af83426c380 ("x86/kasan: add and use kasan_map_populate()")

from the akpm-current tree.

I fixed it up (hopefully - see below) and can carry the fix as
necessary. This is now fixed as far as linux-next is concerned, but any
non trivial conflicts should be mentioned to your upstream maintainer
when your tree is submitted for merging.  You may also want to consider
cooperating with the maintainer of the conflicting tree to minimise any
particularly complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc arch/x86/mm/kasan_init_64.c
index fe5760db7b19,9778fec8a5dc..000000000000
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@@ -15,8 -15,73 +15,75 @@@
  
  extern struct range pfn_mapped[E820_MAX_ENTRIES];
  
 +static p4d_t tmp_p4d_table[PTRS_PER_P4D] __initdata __aligned(PAGE_SIZE);
 +
+ /* Creates mappings for kasan during early boot. The mapped memory is zeroed */
+ static int __meminit kasan_map_populate(unsigned long start, unsigned long end,
+ 					int node)
+ {
+ 	unsigned long addr, pfn, next;
+ 	unsigned long long size;
+ 	pgd_t *pgd;
+ 	p4d_t *p4d;
+ 	pud_t *pud;
+ 	pmd_t *pmd;
+ 	pte_t *pte;
+ 	int ret;
+ 
+ 	ret = vmemmap_populate(start, end, node);
+ 	/*
+ 	 * We might have partially populated memory, so check for no entries,
+ 	 * and zero only those that actually exist.
+ 	 */
+ 	for (addr = start; addr < end; addr = next) {
+ 		pgd = pgd_offset_k(addr);
+ 		if (pgd_none(*pgd)) {
+ 			next = pgd_addr_end(addr, end);
+ 			continue;
+ 		}
+ 
+ 		p4d = p4d_offset(pgd, addr);
+ 		if (p4d_none(*p4d)) {
+ 			next = p4d_addr_end(addr, end);
+ 			continue;
+ 		}
+ 
+ 		pud = pud_offset(p4d, addr);
+ 		if (pud_none(*pud)) {
+ 			next = pud_addr_end(addr, end);
+ 			continue;
+ 		}
+ 		if (pud_large(*pud)) {
+ 			/* This is PUD size page */
+ 			next = pud_addr_end(addr, end);
+ 			size = PUD_SIZE;
+ 			pfn = pud_pfn(*pud);
+ 		} else {
+ 			pmd = pmd_offset(pud, addr);
+ 			if (pmd_none(*pmd)) {
+ 				next = pmd_addr_end(addr, end);
+ 				continue;
+ 			}
+ 			if (pmd_large(*pmd)) {
+ 				/* This is PMD size page */
+ 				next = pmd_addr_end(addr, end);
+ 				size = PMD_SIZE;
+ 				pfn = pmd_pfn(*pmd);
+ 			} else {
+ 				pte = pte_offset_kernel(pmd, addr);
+ 				next = addr + PAGE_SIZE;
+ 				if (pte_none(*pte))
+ 					continue;
+ 				/* This is base size page */
+ 				size = PAGE_SIZE;
+ 				pfn = pte_pfn(*pte);
+ 			}
+ 		}
+ 		memset(phys_to_virt(PFN_PHYS(pfn)), 0, size);
+ 	}
+ 	return ret;
+ }
+ 
  static int __init map_range(struct range *range)
  {
  	unsigned long start;

             reply index

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-02  7:19 Stephen Rothwell [this message]
  -- strict thread matches above, loose matches on Subject: below --
2019-10-31  5:43 Stephen Rothwell
2019-06-24 10:24 Stephen Rothwell
2019-05-01 11:10 Stephen Rothwell
2019-01-31  4:31 Stephen Rothwell
2018-08-20  4:32 Stephen Rothwell
2018-08-20 19:52 ` Andrew Morton
2018-03-23  5:59 Stephen Rothwell
2017-12-18  5:04 Stephen Rothwell
2017-11-10  4:33 Stephen Rothwell
2017-08-22  6:57 Stephen Rothwell
2017-08-23  6:39 ` Vlastimil Babka
2017-08-11  7:53 Stephen Rothwell
2017-08-11  9:34 ` Peter Zijlstra
2017-08-11 10:48   ` Peter Zijlstra
2017-08-11 11:45   ` Stephen Rothwell
2017-08-11 11:56     ` Ingo Molnar
2017-08-11 12:17       ` Peter Zijlstra
2017-08-11 12:44         ` Ingo Molnar
2017-08-11 13:49           ` Stephen Rothwell
2017-08-11 14:04       ` Peter Zijlstra
2017-08-13  6:06         ` Nadav Amit
2017-08-13 12:50           ` Peter Zijlstra
2017-08-14  3:16             ` Minchan Kim
2017-08-14  5:07               ` Nadav Amit
2017-08-14  5:23                 ` Minchan Kim
2017-08-14  8:38                 ` Minchan Kim
2017-08-14 19:57                   ` Peter Zijlstra
2017-08-16  4:14                     ` Minchan Kim
2017-08-14 19:38                 ` Peter Zijlstra
2017-08-15  7:51                   ` Nadav Amit
2017-08-14  3:09         ` Minchan Kim
2017-08-14 18:54           ` Peter Zijlstra
2017-04-12  6:46 Stephen Rothwell
2017-04-12 20:53 ` Vlastimil Babka
2017-04-20  2:17   ` NeilBrown
2017-03-24  5:25 Stephen Rothwell
2017-02-17  4:40 Stephen Rothwell
2016-11-14  6:08 Stephen Rothwell
2016-07-29  4:14 Stephen Rothwell
2016-06-15  5:23 Stephen Rothwell
2016-06-18 19:39 ` Manfred Spraul
2016-04-29  6:12 Stephen Rothwell
2016-04-29  6:26 ` Ingo Molnar
2016-03-02  5:40 Stephen Rothwell
2016-02-26  5:07 Stephen Rothwell
2016-02-26 21:35 ` Andrew Morton
2016-02-19  4:09 Stephen Rothwell
2016-02-19 15:26 ` Ard Biesheuvel
2015-12-07  8:06 Stephen Rothwell
2015-10-02  4:21 Stephen Rothwell
2015-07-28  6:00 Stephen Rothwell
2015-07-29 17:12 ` Andrea Arcangeli
2015-07-29 17:47   ` Andy Lutomirski
2015-07-29 18:46     ` Thomas Gleixner
2015-07-30 15:38       ` Andrea Arcangeli
2015-07-29 23:06   ` Stephen Rothwell
2015-07-29 23:07     ` Thomas Gleixner
2015-09-07 23:35   ` Stephen Rothwell
2015-09-08 18:11     ` Linus Torvalds
2015-09-08 22:56       ` Stephen Rothwell
2015-09-08 23:03         ` Linus Torvalds
2015-09-08 23:21           ` Andrew Morton
2015-09-16  6:58             ` Geert Uytterhoeven
2015-06-04 12:07 Stephen Rothwell
2015-04-08  8:28 Stephen Rothwell
2015-04-08  8:25 Stephen Rothwell
2014-03-17  9:31 Stephen Rothwell
2014-03-17  9:36 ` Peter Zijlstra
2014-03-19 23:27   ` Andrew Morton
2014-01-14  4:53 Stephen Rothwell
2014-01-14  5:04 ` Davidlohr Bueso
2014-01-14 12:51 ` Peter Zijlstra
2014-01-14 13:17   ` Geert Uytterhoeven
2014-01-14 13:33     ` Peter Zijlstra
2014-01-14 16:19     ` H. Peter Anvin
2014-01-14 15:15   ` H. Peter Anvin
2014-01-14 15:20     ` Geert Uytterhoeven
2014-01-14 15:41       ` Peter Zijlstra
2014-01-14 15:48         ` H. Peter Anvin
2014-01-07  6:00 Stephen Rothwell
2014-01-07  6:34 ` Tang Chen
2013-11-08  7:48 Stephen Rothwell
2013-11-08 18:58 ` Josh Triplett
2013-11-08 23:20   ` Stephen Rothwell
2013-11-09  0:19     ` Josh Triplett
2013-10-30  6:40 Stephen Rothwell

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