[PATCH] s390: core s390

From: Martin Schwidefsky <schwidefsky@de.ibm.com>

s390 core changes:
 - Move setting/clearing of TIF_31BIT thread flag to SET_PERSONALITY.
 - Use TASK_UNMAPPED_BASE in elf_map32 for mmaps with address 0.
 - Define ARCH_KMALLOC_MINALIGN.
 - Define ARCH_MIN_TASKALIGN.

arch/s390/kernel/binfmt_elf32.c

@@ -41,7 +41,6 @@
 #define ELF_PLAT_INIT(_r, load_addr) \
 	do { \
 		_r->gprs[14] = 0; \
-	set_thread_flag(TIF_31BIT); \
 	} while(0)
 
 #define USE_ELF_CORE_DUMP
@@ -82,6 +81,7 @@ do {							\
 		set_personality(PER_SVR4);              \
 	else if (current->personality != PER_LINUX32)   \
 		set_personality(PER_LINUX);             \
+	set_thread_flag(TIF_31BIT);			\
 } while (0)
 
 #include "compat_linux.h"
@@ -194,10 +194,7 @@ elf_map32 (struct file *filep, unsigned long addr, struct elf_phdr *eppnt, int p
 	unsigned long map_addr;
 
 	if (!addr) 
-		addr = 0x40000000; 
-
-	if (prot & PROT_READ) 
-		prot |= PROT_EXEC; 
+		addr = TASK_UNMAPPED_BASE;
 
 	down_write(&current->mm->mmap_sem);
 	map_addr = do_mmap(filep, ELF_PAGESTART(addr),

arch/s390/kernel/sys_s390.c

@@ -4,6 +4,7 @@
  *  S390 version
  *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ *               Thomas Spatzier (tspat@de.ibm.com)
  *
  *  Derived from "arch/i386/kernel/sys_i386.c"
  *

include/asm-s390/cache.h

@@ -15,4 +15,6 @@
 #define L1_CACHE_SHIFT     8
 #define L1_CACHE_SHIFT_MAX 8	/* largest L1 which this arch supports */
 
+#define ARCH_KMALLOC_MINALIGN	8
+
 #endif

include/asm-s390/elf.h

@@ -123,16 +123,10 @@ typedef s390_regs elf_gregset_t;
 
 /* For SVR4/S390 the function pointer to be registered with `atexit` is
    passed in R14. */
-#ifndef __s390x__
-#define ELF_PLAT_INIT(_r, load_addr) \
-	_r->gprs[14] = 0
-#else /* __s390x__ */
 #define ELF_PLAT_INIT(_r, load_addr) \
 	do { \
 		_r->gprs[14] = 0; \
-	clear_thread_flag(TIF_31BIT); \
-	} while(0)
-#endif /* __s390x__ */
+	} while (0)
 
 #define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE	4096

include/asm-s390/processor.h

@@ -98,6 +98,8 @@ struct thread_struct {
 
 typedef struct thread_struct thread_struct;
 
+#define ARCH_MIN_TASKALIGN	8
+
 #ifndef __s390x__
 # define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _SEGMENT_TABLE
 #else /* __s390x__ */