syscall_stub_start is declared with different types in C files:

  arch/um/kernel/physmem.c: extern int __syscall_stub_start;
  arch/um/kernel/skas/mmu.c: extern int __syscall_stub_start;
  arch/um/os-Linux/skas/mem.c: extern unsigned long __syscall_stub_start;
  arch/um/os-Linux/skas/process.c: extern int __syscall_stub_start;

Fix this inconsistency by always using unsigned long.  This does not
change anything in the compiled code because only the address of
__syscall_stub_start is used, but it makes the static checker I use
stop complaining about incompatible declarations.

Signed-off-by: Nicolas Iooss <nicolas.iooss_li...@m4x.org>
---
 arch/um/kernel/physmem.c        | 2 +-
 arch/um/kernel/skas/mmu.c       | 2 +-
 arch/um/os-Linux/skas/process.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 30fdd5d0067b..f1d7ed26d638 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -75,7 +75,7 @@ void map_memory(unsigned long virt, unsigned long phys, 
unsigned long len,
        }
 }
 
-extern int __syscall_stub_start;
+extern unsigned long __syscall_stub_start;
 
 void __init setup_physmem(unsigned long start, unsigned long reserve_end,
                          unsigned long len, unsigned long long highmem)
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 007d5503f49b..4bdd49e0bdc3 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -12,7 +12,7 @@
 #include <os.h>
 #include <skas.h>
 
-extern int __syscall_stub_start;
+extern unsigned long __syscall_stub_start;
 
 static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
                         unsigned long kernel)
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 908579f2b0ab..f30575557791 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -193,7 +193,7 @@ static void handle_trap(int pid, struct uml_pt_regs *regs,
        handle_syscall(regs);
 }
 
-extern int __syscall_stub_start;
+extern unsigned long __syscall_stub_start;
 
 static int userspace_tramp(void *stack)
 {
-- 
2.1.2


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