6 files changed, 23 insertions, 15 deletions

diff --git a/arch/mips/include/asm/bug.h b/arch/mips/include/asm/bug.h
index 6cf29c26e87..540c98a810d 100644
--- a/arch/mips/include/asm/bug.h
+++ b/arch/mips/include/asm/bug.h
@@ -11,9 +11,7 @@
 static inline void __noreturn BUG(void)
 {
         __asm__ __volatile__("break %0" : : "i" (BRK_BUG));
-        /* Fool GCC into thinking the function doesn't return. */
-        while (1)
-                ;
+        unreachable();
 }
 
 #define HAVE_ARCH_BUG
diff --git a/arch/mips/include/asm/cacheflush.h b/arch/mips/include/asm/cacheflush.h
index 03b1d69b142..40bb9fde205 100644
--- a/arch/mips/include/asm/cacheflush.h
+++ b/arch/mips/include/asm/cacheflush.h
@@ -38,6 +38,7 @@ extern void (*flush_cache_range)(struct vm_area_struct *vma,
 extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
 extern void __flush_dcache_page(struct page *page);
 
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
 static inline void flush_dcache_page(struct page *page)
 {
         if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
diff --git a/arch/mips/include/asm/mman.h b/arch/mips/include/asm/mman.h
index a2250f390a2..c892bfb3e2c 100644
--- a/arch/mips/include/asm/mman.h
+++ b/arch/mips/include/asm/mman.h
@@ -75,6 +75,7 @@
 
 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
+#define MADV_HWPOISON    100            /* poison a page for testing */
 
 /* compatibility flags */
 #define MAP_FILE        0
diff --git a/arch/mips/include/asm/socket.h b/arch/mips/include/asm/socket.h
index ae05accd9fe..9de5190f248 100644
--- a/arch/mips/include/asm/socket.h
+++ b/arch/mips/include/asm/socket.h
@@ -80,6 +80,8 @@ To add: #define SO_REUSEPORT 0x0200	/* Allow local address and port reuse.  */
 #define SO_TIMESTAMPING         37
 #define SCM_TIMESTAMPING        SO_TIMESTAMPING
 
+#define SO_RXQ_OVFL             40
+
 #ifdef __KERNEL__
 
 /** sock_type - Socket types
diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h
index fcf5f98d90c..83b5509e09e 100644
--- a/arch/mips/include/asm/system.h
+++ b/arch/mips/include/asm/system.h
@@ -12,6 +12,7 @@
 #ifndef _ASM_SYSTEM_H
 #define _ASM_SYSTEM_H
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/irqflags.h>
 
@@ -193,10 +194,6 @@ extern __u64 __xchg_u64_unsupported_on_32bit_kernels(volatile __u64 * m, __u64 v
 #define __xchg_u64 __xchg_u64_unsupported_on_32bit_kernels
 #endif
 
-/* This function doesn't exist, so you'll get a linker error
-   if something tries to do an invalid xchg().  */
-extern void __xchg_called_with_bad_pointer(void);
-
 static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
 {
         switch (size) {
@@ -205,11 +202,17 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz
         case 8:
                 return __xchg_u64(ptr, x);
         }
-        __xchg_called_with_bad_pointer();
+
         return x;
 }
 
-#define xchg(ptr, x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+#define xchg(ptr, x)                                                    \
+({                                                                      \
+        BUILD_BUG_ON(sizeof(*(ptr)) & ~0xc);                            \
+                                                                        \
+        ((__typeof__(*(ptr)))                                           \
+                __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))));     \
+})
 
 extern void set_handler(unsigned long offset, void *addr, unsigned long len);
 extern void set_uncached_handler(unsigned long offset, void *addr, unsigned long len);
diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h
index 8c9dfa9e901..65c679ecbe6 100644
--- a/arch/mips/include/asm/unistd.h
+++ b/arch/mips/include/asm/unistd.h
@@ -355,16 +355,17 @@
 #define __NR_rt_tgsigqueueinfo          (__NR_Linux + 332)
 #define __NR_perf_event_open            (__NR_Linux + 333)
 #define __NR_accept4                    (__NR_Linux + 334)
+#define __NR_recvmmsg                   (__NR_Linux + 335)
 
 /*
  * Offset of the last Linux o32 flavoured syscall
  */
-#define __NR_Linux_syscalls             334
+#define __NR_Linux_syscalls             335
 
 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
 
 #define __NR_O32_Linux                  4000
-#define __NR_O32_Linux_syscalls         334
+#define __NR_O32_Linux_syscalls         335
 
 #if _MIPS_SIM == _MIPS_SIM_ABI64
 
@@ -666,16 +667,17 @@
 #define __NR_rt_tgsigqueueinfo          (__NR_Linux + 291)
 #define __NR_perf_event_open            (__NR_Linux + 292)
 #define __NR_accept4                    (__NR_Linux + 293)
+#define __NR_recvmmsg                   (__NR_Linux + 294)
 
 /*
  * Offset of the last Linux 64-bit flavoured syscall
  */
-#define __NR_Linux_syscalls             293
+#define __NR_Linux_syscalls             294
 
 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 */
 
 #define __NR_64_Linux                   5000
-#define __NR_64_Linux_syscalls          293
+#define __NR_64_Linux_syscalls          294
 
 #if _MIPS_SIM == _MIPS_SIM_NABI32
 
@@ -981,16 +983,17 @@
 #define __NR_rt_tgsigqueueinfo          (__NR_Linux + 295)
 #define __NR_perf_event_open            (__NR_Linux + 296)
 #define __NR_accept4                    (__NR_Linux + 297)
+#define __NR_recvmmsg                   (__NR_Linux + 298)
 
 /*
  * Offset of the last N32 flavoured syscall
  */
-#define __NR_Linux_syscalls             297
+#define __NR_Linux_syscalls             298
 
 #endif /* _MIPS_SIM == _MIPS_SIM_NABI32 */
 
 #define __NR_N32_Linux                  6000
-#define __NR_N32_Linux_syscalls         297
+#define __NR_N32_Linux_syscalls         298
 
 #ifdef __KERNEL__