This is a note to let you know that I've just added the patch titled
sparc64: redefine first version
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc64-redefine-first-version.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Jun 8 09:20:28 CEST 2017
From: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Date: Wed, 31 May 2017 11:25:22 -0400
Subject: sparc64: redefine first version
From: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
[ Upstream commit c4415235b2be0cc791572e8e7f7466ab8f73a2bf ]
CTX_FIRST_VERSION defines the first context version, but also it defines
first context. This patch redefines it to only include the first context
version.
Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Reviewed-by: Bob Picco <bob.picco@xxxxxxxxxx>
Reviewed-by: Steven Sistare <steven.sistare@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/sparc/include/asm/mmu_64.h | 2 +-
arch/sparc/mm/init_64.c | 6 +++---
2 files changed, 4 insertions(+), 4 deletions(-)
--- a/arch/sparc/include/asm/mmu_64.h
+++ b/arch/sparc/include/asm/mmu_64.h
@@ -52,7 +52,7 @@
#define CTX_NR_MASK TAG_CONTEXT_BITS
#define CTX_HW_MASK (CTX_NR_MASK | CTX_PGSZ_MASK)
-#define CTX_FIRST_VERSION ((_AC(1,UL) << CTX_VERSION_SHIFT) + _AC(1,UL))
+#define CTX_FIRST_VERSION BIT(CTX_VERSION_SHIFT)
#define CTX_VALID(__ctx) \
(!(((__ctx.sparc64_ctx_val) ^ tlb_context_cache) & CTX_VERSION_MASK))
#define CTX_HWBITS(__ctx) ((__ctx.sparc64_ctx_val) & CTX_HW_MASK)
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -656,7 +656,7 @@ EXPORT_SYMBOL(__flush_dcache_range);
/* get_new_mmu_context() uses "cache + 1". */
DEFINE_SPINLOCK(ctx_alloc_lock);
-unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1;
+unsigned long tlb_context_cache = CTX_FIRST_VERSION;
#define MAX_CTX_NR (1UL << CTX_NR_BITS)
#define CTX_BMAP_SLOTS BITS_TO_LONGS(MAX_CTX_NR)
DECLARE_BITMAP(mmu_context_bmap, MAX_CTX_NR);
@@ -687,9 +687,9 @@ void get_new_mmu_context(struct mm_struc
if (new_ctx >= ctx) {
int i;
new_ctx = (tlb_context_cache & CTX_VERSION_MASK) +
- CTX_FIRST_VERSION;
+ CTX_FIRST_VERSION + 1;
if (new_ctx == 1)
- new_ctx = CTX_FIRST_VERSION;
+ new_ctx = CTX_FIRST_VERSION + 1;
/* Don't call memset, for 16 entries that's just
* plain silly...
Patches currently in stable-queue which might be from pasha.tatashin@xxxxxxxxxx are
queue-4.4/sparc64-new-context-wrap.patch
queue-4.4/sparc64-combine-activate_mm-and-switch_mm.patch
queue-4.4/sparc64-add-per-cpu-mm-of-secondary-contexts.patch
queue-4.4/sparc64-reset-mm-cpumask-after-wrap.patch
queue-4.4/sparc64-redefine-first-version.patch
queue-4.4/sparc64-delete-old-wrap-code.patch