s390/kernel: convert SYSCALL and PGM_CHECK handlers to .quad

With a relocatable kernel that could reside at any place in memory, the
storage size for the SYSCALL and PGM_CHECK handlers needs to be
increased from .long to .quad.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h
index 96f9a91..8f77bb4 100644 (file)
--- a/arch/s390/include/asm/syscall.h
+++ b/arch/s390/include/asm/syscall.h
@@ -14,13 +14,8 @@
 #include <linux/err.h>
 #include <asm/ptrace.h>
 
-/*
- * The syscall table always contains 32 bit pointers since we know that the
- * address of the function to be called is (way) below 4GB.  So the "int"
- * type here is what we want [need] for both 32 bit and 64 bit systems.
- */
-extern const unsigned int sys_call_table[];
-extern const unsigned int sys_call_table_emu[];
+extern const unsigned long sys_call_table[];
+extern const unsigned long sys_call_table_emu[];
 
 static inline long syscall_get_nr(struct task_struct *task,
                                  struct pt_regs *regs)

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 583d65e..baa67e4 100644 (file)
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -358,19 +358,19 @@ ENTRY(system_call)
        # load address of system call table
        lg      %r10,__THREAD_sysc_table(%r13,%r12)
        llgh    %r8,__PT_INT_CODE+2(%r11)
-       slag    %r8,%r8,2                       # shift and test for svc 0
+       slag    %r8,%r8,3                       # shift and test for svc 0
        jnz     .Lsysc_nr_ok
        # svc 0: system call number in %r1
        llgfr   %r1,%r1                         # clear high word in r1
        cghi    %r1,NR_syscalls
        jnl     .Lsysc_nr_ok
        sth     %r1,__PT_INT_CODE+2(%r11)
-       slag    %r8,%r1,2
+       slag    %r8,%r1,3
 .Lsysc_nr_ok:
        xc      __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
        stg     %r2,__PT_ORIG_GPR2(%r11)
        stg     %r7,STACK_FRAME_OVERHEAD(%r15)
-       lgf     %r9,0(%r8,%r10)                 # get system call add.
+       lg      %r9,0(%r8,%r10)                 # get system call add.
        TSTMSK  __TI_flags(%r12),_TIF_TRACE
        jnz     .Lsysc_tracesys
        BASR_EX %r14,%r9                        # call sys_xxxx
@@ -556,8 +556,8 @@ ENTRY(system_call)
        lghi    %r0,NR_syscalls
        clgr    %r0,%r2
        jnh     .Lsysc_tracenogo
-       sllg    %r8,%r2,2
-       lgf     %r9,0(%r8,%r10)
+       sllg    %r8,%r2,3
+       lg      %r9,0(%r8,%r10)
 .Lsysc_tracego:
        lmg     %r3,%r7,__PT_R3(%r11)
        stg     %r7,STACK_FRAME_OVERHEAD(%r15)
@@ -665,9 +665,9 @@ ENTRY(pgm_check_handler)
        larl    %r1,pgm_check_table
        llgh    %r10,__PT_INT_CODE+2(%r11)
        nill    %r10,0x007f
-       sll     %r10,2
+       sll     %r10,3
        je      .Lpgm_return
-       lgf     %r9,0(%r10,%r1)         # load address of handler routine
+       lg      %r9,0(%r10,%r1)         # load address of handler routine
        lgr     %r2,%r11                # pass pointer to pt_regs
        BASR_EX %r14,%r9                # branch to interrupt-handler
 .Lpgm_return:
@@ -1512,7 +1512,7 @@ cleanup_critical:
        .quad   .Lsie_skip - .Lsie_entry
 #endif
        .section .rodata, "a"
-#define SYSCALL(esame,emu)     .long __s390x_ ## esame
+#define SYSCALL(esame,emu)     .quad __s390x_ ## esame
        .globl  sys_call_table
 sys_call_table:
 #include "asm/syscall_table.h"
@@ -1520,7 +1520,7 @@ sys_call_table:
 
 #ifdef CONFIG_COMPAT
 
-#define SYSCALL(esame,emu)     .long __s390_ ## emu
+#define SYSCALL(esame,emu)     .quad __s390_ ## emu
        .globl  sys_call_table_emu
 sys_call_table_emu:
 #include "asm/syscall_table.h"

diff --git a/arch/s390/kernel/pgm_check.S b/arch/s390/kernel/pgm_check.S
index 3e62aae..59dee9d 100644 (file)
--- a/arch/s390/kernel/pgm_check.S
+++ b/arch/s390/kernel/pgm_check.S
@@ -7,7 +7,7 @@
 
 #include <linux/linkage.h>
 
-#define PGM_CHECK(handler)     .long handler
+#define PGM_CHECK(handler)     .quad handler
 #define PGM_CHECK_DEFAULT      PGM_CHECK(default_trap_handler)
 
 /*