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-rw-r--r--arch/Kconfig3
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/Kconfig.cpu3
-rw-r--r--arch/x86/um/Kconfig4
-rw-r--r--mm/slub.c9
5 files changed, 10 insertions, 10 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 22182a8cc62c..4f55c736be11 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -196,4 +196,7 @@ config HAVE_ALIGNED_STRUCT_PAGE
196config HAVE_CMPXCHG_LOCAL 196config HAVE_CMPXCHG_LOCAL
197 bool 197 bool
198 198
199config HAVE_CMPXCHG_DOUBLE
200 bool
201
199source "kernel/gcov/Kconfig" 202source "kernel/gcov/Kconfig"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 59717fd17bc7..6c14ecd851d0 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -62,6 +62,7 @@ config X86
62 select ANON_INODES 62 select ANON_INODES
63 select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386 63 select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
64 select HAVE_CMPXCHG_LOCAL if !M386 64 select HAVE_CMPXCHG_LOCAL if !M386
65 select HAVE_CMPXCHG_DOUBLE
65 select HAVE_ARCH_KMEMCHECK 66 select HAVE_ARCH_KMEMCHECK
66 select HAVE_USER_RETURN_NOTIFIER 67 select HAVE_USER_RETURN_NOTIFIER
67 select ARCH_BINFMT_ELF_RANDOMIZE_PIE 68 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 99d2ab8b7795..3c57033e2211 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -309,9 +309,6 @@ config X86_INTERNODE_CACHE_SHIFT
309config X86_CMPXCHG 309config X86_CMPXCHG
310 def_bool X86_64 || (X86_32 && !M386) 310 def_bool X86_64 || (X86_32 && !M386)
311 311
312config CMPXCHG_DOUBLE
313 def_bool y
314
315config X86_L1_CACHE_SHIFT 312config X86_L1_CACHE_SHIFT
316 int 313 int
317 default "7" if MPENTIUM4 || MPSC 314 default "7" if MPENTIUM4 || MPSC
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index a62bfc66239e..b2b54d2edf53 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -6,10 +6,6 @@ menu "UML-specific options"
6 6
7menu "Host processor type and features" 7menu "Host processor type and features"
8 8
9config CMPXCHG_DOUBLE
10 bool
11 default n
12
13source "arch/x86/Kconfig.cpu" 9source "arch/x86/Kconfig.cpu"
14 10
15endmenu 11endmenu
diff --git a/mm/slub.c b/mm/slub.c
index 72aa84134609..4907563ef7ff 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -366,7 +366,8 @@ static inline bool __cmpxchg_double_slab(struct kmem_cache *s, struct page *page
366 const char *n) 366 const char *n)
367{ 367{
368 VM_BUG_ON(!irqs_disabled()); 368 VM_BUG_ON(!irqs_disabled());
369#if defined(CONFIG_CMPXCHG_DOUBLE) && defined(CONFIG_HAVE_ALIGNED_STRUCT_PAGE) 369#if defined(CONFIG_HAVE_CMPXCHG_DOUBLE) && \
370 defined(CONFIG_HAVE_ALIGNED_STRUCT_PAGE)
370 if (s->flags & __CMPXCHG_DOUBLE) { 371 if (s->flags & __CMPXCHG_DOUBLE) {
371 if (cmpxchg_double(&page->freelist, &page->counters, 372 if (cmpxchg_double(&page->freelist, &page->counters,
372 freelist_old, counters_old, 373 freelist_old, counters_old,
@@ -400,7 +401,8 @@ static inline bool cmpxchg_double_slab(struct kmem_cache *s, struct page *page,
400 void *freelist_new, unsigned long counters_new, 401 void *freelist_new, unsigned long counters_new,
401 const char *n) 402 const char *n)
402{ 403{
403#if defined(CONFIG_CMPXCHG_DOUBLE) && defined(CONFIG_HAVE_ALIGNED_STRUCT_PAGE) 404#if defined(CONFIG_HAVE_CMPXCHG_DOUBLE) && \
405 defined(CONFIG_HAVE_ALIGNED_STRUCT_PAGE)
404 if (s->flags & __CMPXCHG_DOUBLE) { 406 if (s->flags & __CMPXCHG_DOUBLE) {
405 if (cmpxchg_double(&page->freelist, &page->counters, 407 if (cmpxchg_double(&page->freelist, &page->counters,
406 freelist_old, counters_old, 408 freelist_old, counters_old,
@@ -3014,7 +3016,8 @@ static int kmem_cache_open(struct kmem_cache *s,
3014 } 3016 }
3015 } 3017 }
3016 3018
3017#if defined(CONFIG_CMPXCHG_DOUBLE) && defined(CONFIG_HAVE_ALIGNED_STRUCT_PAGE) 3019#if defined(CONFIG_HAVE_CMPXCHG_DOUBLE) && \
3020 defined(CONFIG_HAVE_ALIGNED_STRUCT_PAGE)
3018 if (system_has_cmpxchg_double() && (s->flags & SLAB_DEBUG_FLAGS) == 0) 3021 if (system_has_cmpxchg_double() && (s->flags & SLAB_DEBUG_FLAGS) == 0)
3019 /* Enable fast mode */ 3022 /* Enable fast mode */
3020 s->flags |= __CMPXCHG_DOUBLE; 3023 s->flags |= __CMPXCHG_DOUBLE;