8 files changed, 65 insertions, 28 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 2ed88122be93..8d41908e2513 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -317,6 +317,9 @@ config ARCH_ENABLE_MEMORY_HOTPLUG
         def_bool y
         depends on SPARSEMEM
 
+config ARCH_ENABLE_MEMORY_HOTREMOVE
+        def_bool y
+
 source "mm/Kconfig"
 
 comment "I/O subsystem configuration"
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index d003a6e16afb..328a20e880b5 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1732,3 +1732,40 @@ compat_sys_timerfd_gettime_wrapper:
         lgfr    %r2,%r2                 # int
         llgtr   %r3,%r3                 # struct compat_itimerspec *
         jg      compat_sys_timerfd_gettime
+
+        .globl compat_sys_signalfd4_wrapper
+compat_sys_signalfd4_wrapper:
+        lgfr    %r2,%r2                 # int
+        llgtr   %r3,%r3                 # compat_sigset_t *
+        llgfr   %r4,%r4                 # compat_size_t
+        lgfr    %r5,%r5                 # int
+        jg      compat_sys_signalfd4
+
+        .globl sys_eventfd2_wrapper
+sys_eventfd2_wrapper:
+        llgfr   %r2,%r2                 # unsigned int
+        lgfr    %r3,%r3                 # int
+        jg      sys_eventfd2
+
+        .globl  sys_inotify_init1_wrapper
+sys_inotify_init1_wrapper:
+        lgfr    %r2,%r2                 # int
+        jg      sys_inotify_init1
+
+        .globl  sys_pipe2_wrapper
+sys_pipe2_wrapper:
+        llgtr   %r2,%r2                 # u32 *
+        lgfr    %r3,%r3                 # int
+        jg      sys_pipe2               # branch to system call
+
+        .globl  sys_dup3_wrapper
+sys_dup3_wrapper:
+        llgfr   %r2,%r2                 # unsigned int
+        llgfr   %r3,%r3                 # unsigned int
+        lgfr    %r4,%r4                 # int
+        jg      sys_dup3                # branch to system call
+
+        .globl  sys_epoll_create1_wrapper
+sys_epoll_create1_wrapper:
+        lgfr    %r2,%r2                 # int
+        jg      sys_epoll_create1       # branch to system call
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 54b2779b5e2f..2dcf590faba6 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -1705,7 +1705,10 @@ void __init setup_ipl(void)
 
 void __init ipl_update_parameters(void)
 {
-        if (diag308(DIAG308_STORE, &ipl_block) == DIAG308_RC_OK)
+        int rc;
+
+        rc = diag308(DIAG308_STORE, &ipl_block);
+        if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
                 diag308_set_works = 1;
 }
 
diff --git a/arch/s390/kernel/mem_detect.c b/arch/s390/kernel/mem_detect.c
index 18ed7abe16c5..9872999c66d1 100644
--- a/arch/s390/kernel/mem_detect.c
+++ b/arch/s390/kernel/mem_detect.c
@@ -9,27 +9,6 @@
 #include <asm/sclp.h>
 #include <asm/setup.h>
 
-static int memory_fast_detect(struct mem_chunk *chunk)
-{
-        unsigned long val0 = 0;
-        unsigned long val1 = 0xc;
-        int rc = -EOPNOTSUPP;
-
-        if (ipl_flags & IPL_NSS_VALID)
-                return -EOPNOTSUPP;
-        asm volatile(
-                "       diag    %1,%2,0x260\n"
-                "0:     lhi     %0,0\n"
-                "1:\n"
-                EX_TABLE(0b,1b)
-                : "+d" (rc), "+d" (val0), "+d" (val1) : : "cc");
-
-        if (rc || val0 != val1)
-                return -EOPNOTSUPP;
-        chunk->size = val0 + 1;
-        return 0;
-}
-
 static inline int tprot(unsigned long addr)
 {
         int rc = -EFAULT;
@@ -84,8 +63,6 @@ void detect_memory_layout(struct mem_chunk chunk[])
         unsigned long flags, cr0;
 
         memset(chunk, 0, MEMORY_CHUNKS * sizeof(struct mem_chunk));
-        if (memory_fast_detect(&chunk[0]) == 0)
-                return;
         /* Disable IRQs, DAT and low address protection so tprot does the
          * right thing and we don't get scheduled away with low address
          * protection disabled.
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index c87ec687d4c6..c66d35e55142 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -330,3 +330,9 @@ SYSCALL(sys_eventfd,sys_eventfd,sys_eventfd_wrapper)
 SYSCALL(sys_timerfd_create,sys_timerfd_create,sys_timerfd_create_wrapper)
 SYSCALL(sys_timerfd_settime,sys_timerfd_settime,compat_sys_timerfd_settime_wrapper) /* 320 */
 SYSCALL(sys_timerfd_gettime,sys_timerfd_gettime,compat_sys_timerfd_gettime_wrapper)
+SYSCALL(sys_signalfd4,sys_signalfd4,compat_sys_signalfd4_wrapper)
+SYSCALL(sys_eventfd2,sys_eventfd2,sys_eventfd2_wrapper)
+SYSCALL(sys_inotify_init1,sys_inotify_init1,sys_inotify_init1_wrapper)
+SYSCALL(sys_pipe2,sys_pipe2,sys_pipe2_wrapper) /* 325 */
+SYSCALL(sys_dup3,sys_dup3,sys_dup3_wrapper)
+SYSCALL(sys_epoll_create1,sys_epoll_create1,sys_epoll_create1_wrapper)
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index ab70d9bd9261..ca114fe46ffb 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -1348,7 +1348,7 @@ early_param("stp", early_parse_stp);
 /*
  * Reset STP attachment.
  */
-static void stp_reset(void)
+static void __init stp_reset(void)
 {
         int rc;
 
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index eae21a8ac72d..fc6ab6094df8 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -43,7 +43,7 @@ void __udelay(unsigned long usecs)
                 local_bh_disable();
         local_irq_save(flags);
         if (raw_irqs_disabled_flags(flags)) {
-                old_cc = S390_lowcore.clock_comparator;
+                old_cc = local_tick_disable();
                 S390_lowcore.clock_comparator = -1ULL;
                 __ctl_store(cr0, 0, 0);
                 dummy = (cr0 & 0xffff00e0) | 0x00000800;
@@ -65,7 +65,7 @@ void __udelay(unsigned long usecs)
 
         if (raw_irqs_disabled_flags(flags)) {
                 __ctl_load(cr0, 0, 0);
-                S390_lowcore.clock_comparator = old_cc;
+                local_tick_enable(old_cc);
         }
         if (!irq_context)
                 _local_bh_enable();
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 4993b0f594eb..1169130a97ef 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -179,7 +179,7 @@ int arch_add_memory(int nid, u64 start, u64 size)
         int rc;
 
         pgdat = NODE_DATA(nid);
-        zone = pgdat->node_zones + ZONE_NORMAL;
+        zone = pgdat->node_zones + ZONE_MOVABLE;
         rc = vmem_add_mapping(start, size);
         if (rc)
                 return rc;
@@ -189,3 +189,14 @@ int arch_add_memory(int nid, u64 start, u64 size)
         return rc;
 }
 #endif /* CONFIG_MEMORY_HOTPLUG */
+
+#ifdef CONFIG_MEMORY_HOTREMOVE
+int remove_memory(u64 start, u64 size)
+{
+        unsigned long start_pfn, end_pfn;
+
+        start_pfn = PFN_DOWN(start);
+        end_pfn = start_pfn + PFN_DOWN(size);
+        return offline_pages(start_pfn, end_pfn, 120 * HZ);
+}
+#endif /* CONFIG_MEMORY_HOTREMOVE */