linux-kernel - linux-next: manual merge of the arm-lpae tree with the arm tree

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Date:	Thu, 8 Dec 2011 11:00:59 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Will Deacon <will.deacon@....com>,
	Russell King <rmk@....linux.org.uk>
Subject: linux-next: manual merge of the arm-lpae tree with the arm tree

Hi Catalin,

Today's linux-next merge of the arm-lpae tree got a conflict in
arch/arm/mm/idmap.c between commits 8903826d0cd9 ("ARM: idmap: populate
identity map pgd at init time using .init.text") and 4e8ee7de227e ("ARM:
SMP: use idmap_pgd for mapping MMU enable during secondary booting") from
the arm tree and commit 1932aa1edc86 ("ARM: LPAE: Add identity mapping
support for the 3-level page table format") from the arm-lpae tree.

I tried to fix it up (see below) and can carry the fix as necessary.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

diff --cc arch/arm/mm/idmap.c
index 660f1bc,267db72..0000000
--- a/arch/arm/mm/idmap.c
+++ b/arch/arm/mm/idmap.c
@@@ -1,13 -1,34 +1,38 @@@
  #include <linux/kernel.h>
  
  #include <asm/cputype.h>
 +#include <asm/idmap.h>
  #include <asm/pgalloc.h>
  #include <asm/pgtable.h>
 +#include <asm/sections.h>
 +
 +pgd_t *idmap_pgd;
  
+ #ifdef CONFIG_ARM_LPAE
+ static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end,
+ 	unsigned long prot)
+ {
+ 	pmd_t *pmd;
+ 	unsigned long next;
+ 
+ 	if (pud_none_or_clear_bad(pud) || (pud_val(*pud) & L_PGD_SWAPPER)) {
+ 		pmd = pmd_alloc_one(&init_mm, addr);
+ 		if (!pmd) {
+ 			pr_warning("Failed to allocate identity pmd.\n");
+ 			return;
+ 		}
+ 		pud_populate(&init_mm, pud, pmd);
+ 		pmd += pmd_index(addr);
+ 	} else
+ 		pmd = pmd_offset(pud, addr);
+ 
+ 	do {
+ 		next = pmd_addr_end(addr, end);
+ 		*pmd = __pmd((addr & PMD_MASK) | prot);
+ 		flush_pmd_entry(pmd);
+ 	} while (pmd++, addr = next, addr != end);
+ }
+ #else	/* !CONFIG_ARM_LPAE */
  static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end,
  	unsigned long prot)
  {

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