[PATCH] x86_64: Eliminate IA32_NR_syscalls define

Or rather compute it based on the table length automatically.

This also has the intended side effect of not warning for new system calls
anymore.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 9 deletions

diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S
index 35b2faccdc6c..393dc83f3b83 100644
--- a/arch/x86_64/ia32/ia32entry.S
+++ b/arch/x86_64/ia32/ia32entry.S
@@ -15,6 +15,8 @@
 #include <asm/vsyscall32.h>
 #include <linux/linkage.h>
 
+#define IA32_NR_syscalls ((ia32_syscall_end - ia32_sys_call_table)/8)
+
         .macro IA32_ARG_FIXUP noebp=0
         movl    %edi,%r8d
         .if \noebp
@@ -109,8 +111,8 @@ ENTRY(ia32_sysenter_target)
         CFI_REMEMBER_STATE
         jnz  sysenter_tracesys
 sysenter_do_call:       
-        cmpl    $(IA32_NR_syscalls),%eax
-        jae     ia32_badsys
+        cmpl    $(IA32_NR_syscalls-1),%eax
+        ja      ia32_badsys
         IA32_ARG_FIXUP 1
         call    *ia32_sys_call_table(,%rax,8)
         movq    %rax,RAX-ARGOFFSET(%rsp)
@@ -210,8 +212,8 @@ ENTRY(ia32_cstar_target)
         CFI_REMEMBER_STATE
         jnz   cstar_tracesys
 cstar_do_call:  
-        cmpl $IA32_NR_syscalls,%eax
-        jae  ia32_badsys
+        cmpl $IA32_NR_syscalls-1,%eax
+        ja  ia32_badsys
         IA32_ARG_FIXUP 1
         call *ia32_sys_call_table(,%rax,8)
         movq %rax,RAX-ARGOFFSET(%rsp)
@@ -296,8 +298,8 @@ ENTRY(ia32_syscall)
         testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
         jnz ia32_tracesys
 ia32_do_syscall:        
-        cmpl $(IA32_NR_syscalls),%eax
-        jae  ia32_badsys
+        cmpl $(IA32_NR_syscalls-1),%eax
+        ja  ia32_badsys
         IA32_ARG_FIXUP
         call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
 ia32_sysret:
@@ -691,6 +693,3 @@ ia32_sys_call_table:
         .quad compat_sys_set_robust_list
         .quad compat_sys_get_robust_list
 ia32_syscall_end:               
-        .rept IA32_NR_syscalls-(ia32_syscall_end-ia32_sys_call_table)/8
-                .quad ni_syscall
-        .endr