[PATCH] x86/mm: Fix documentation of module mapping with 4-level paging

[PATCH] x86/mm: Fix documentation of module mapping with 4-level paging

[Kirill A. Shutemov]

f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000") changed
MODULES_END back to fixed value, but didn't update documentation of
memory layout for 4-level paging.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Fixes: f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000")
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
---
 Documentation/x86/x86_64/mm.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt
index ea91cb61a602..5432a96d31ff 100644
--- a/Documentation/x86/x86_64/mm.txt
+++ b/Documentation/x86/x86_64/mm.txt
@@ -20,7 +20,7 @@ ffffff0000000000 - ffffff7fffffffff (=39 bits) %esp fixup stacks
 ffffffef00000000 - fffffffeffffffff (=64 GB) EFI region mapping space
 ... unused hole ...
 ffffffff80000000 - ffffffff9fffffff (=512 MB)  kernel text mapping, from phys 0
-ffffffffa0000000 - [fixmap start]   (~1526 MB) module mapping space (variable)
+ffffffffa0000000 - fffffffffeffffff (1520 MB) module mapping space
 [fixmap start]   - ffffffffff5fffff kernel-internal fixmap range
 ffffffffff600000 - ffffffffff600fff (=4 kB) legacy vsyscall ABI
 ffffffffffe00000 - ffffffffffffffff (=2 MB) unused hole
-- 
2.16.2

Re: [PATCH] x86/mm: Fix documentation of module mapping with 4-level paging

[Andrey Ryabinin]

On 04/02/2018 03:10 PM, Kirill A. Shutemov wrote:
> f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000") changed
> MODULES_END back to fixed value, but didn't update documentation of
> memory layout for 4-level paging.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Fixes: f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000")
> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
> ---

Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>

>  Documentation/x86/x86_64/mm.txt | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt
> index ea91cb61a602..5432a96d31ff 100644
> --- a/Documentation/x86/x86_64/mm.txt
> +++ b/Documentation/x86/x86_64/mm.txt
> @@ -20,7 +20,7 @@ ffffff0000000000 - ffffff7fffffffff (=39 bits) %esp fixup stacks
>  ffffffef00000000 - fffffffeffffffff (=64 GB) EFI region mapping space
>  ... unused hole ...
>  ffffffff80000000 - ffffffff9fffffff (=512 MB)  kernel text mapping, from phys 0
> -ffffffffa0000000 - [fixmap start]   (~1526 MB) module mapping space (variable)
> +ffffffffa0000000 - fffffffffeffffff (1520 MB) module mapping space
>  [fixmap start]   - ffffffffff5fffff kernel-internal fixmap range
>  ffffffffff600000 - ffffffffff600fff (=4 kB) legacy vsyscall ABI
>  ffffffffffe00000 - ffffffffffffffff (=2 MB) unused hole
> 

[tip:x86/urgent] x86/mm: Fix documentation of module mapping range with 4-level paging

[tip-bot for Kirill A. Shutemov]

Commit-ID:  9a3b7e5e65c4b4d332df5f607c0838c3fb918673
Gitweb:     https://git.kernel.org/tip/9a3b7e5e65c4b4d332df5f607c0838c3fb918673
Author:     Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
AuthorDate: Mon, 2 Apr 2018 15:10:25 +0300
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 3 Apr 2018 12:59:02 +0200

x86/mm: Fix documentation of module mapping range with 4-level paging

Commit:

  f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000")

changed MODULES_END back to a fixed value, but didn't update the documentation
of memory layout for 4-level paging.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000")
Link: http://lkml.kernel.org/r/20180402121025.10244-1-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 Documentation/x86/x86_64/mm.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt
index ea91cb61a602..5432a96d31ff 100644
--- a/Documentation/x86/x86_64/mm.txt
+++ b/Documentation/x86/x86_64/mm.txt
@@ -20,7 +20,7 @@ ffffff0000000000 - ffffff7fffffffff (=39 bits) %esp fixup stacks
 ffffffef00000000 - fffffffeffffffff (=64 GB) EFI region mapping space
 ... unused hole ...
 ffffffff80000000 - ffffffff9fffffff (=512 MB)  kernel text mapping, from phys 0
-ffffffffa0000000 - [fixmap start]   (~1526 MB) module mapping space (variable)
+ffffffffa0000000 - fffffffffeffffff (1520 MB) module mapping space
 [fixmap start]   - ffffffffff5fffff kernel-internal fixmap range
 ffffffffff600000 - ffffffffff600fff (=4 kB) legacy vsyscall ABI
 ffffffffffe00000 - ffffffffffffffff (=2 MB) unused hole