target/linux/leon/patches-5.15/0015-sparc-Make-PAGE_NONE-a-valid-PTE.patch

   1 From 91bdb4d2a59aa7a7706c590ca98eb161c0751ee9 Mon Sep 17 00:00:00 2001
   2 From: Daniel Cederman <cederman@gaisler.com>
   3 Date: Wed, 10 Jun 2020 12:26:44 +0200
   4 Subject: [PATCH 15/32] sparc: Make PAGE_NONE a valid PTE
   5
   6 Otherwise when exiting a program that has set a page to PROT_NONE
   7 we get error messages about the page having a bad swap file mapping.
   8 See for example struct-ret-3.c in GCC.
   9 ---
  10  arch/sparc/include/asm/pgtsrmmu.h | 2 +-
  11  1 file changed, 1 insertion(+), 1 deletion(-)
  12
  13 diff --git a/arch/sparc/include/asm/pgtsrmmu.h b/arch/sparc/include/asm/pgtsrmmu.h
  14 index 7708d015712b..117009b03cf4 100644
  15 --- a/arch/sparc/include/asm/pgtsrmmu.h
  16 +++ b/arch/sparc/include/asm/pgtsrmmu.h
  17 @@ -74,7 +74,7 @@
  18   * enforce all the protection levels that vma's can have.
  19   * XXX But for now...
  20   */
  21 -#define SRMMU_PAGE_NONE    __pgprot(SRMMU_CACHE | \
  22 +#define SRMMU_PAGE_NONE    __pgprot(SRMMU_VALID | SRMMU_CACHE | \
  23                                     SRMMU_PRIV | SRMMU_REF)
  24  #define SRMMU_PAGE_SHARED  __pgprot(SRMMU_VALID | SRMMU_CACHE | \
  25                                     SRMMU_EXEC | SRMMU_WRITE | SRMMU_REF)
  26 --
  27 2.34.1
  28