From: Andi Kleen <ak@suse.de>
Date: Fri, 7 Apr 2006 17:50:31 +0000 (+0200)
Subject: [PATCH] x86_64: Eliminate IA32_NR_syscalls define
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=67d53ea5a3d42aadeb1584e757ca4660c0e8a810;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

[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>
---

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
diff --git a/include/asm-x86_64/ia32_unistd.h b/include/asm-x86_64/ia32_unistd.h
index 34ad297f9d58..b4f4b172b15a 100644
--- a/include/asm-x86_64/ia32_unistd.h
+++ b/include/asm-x86_64/ia32_unistd.h
@@ -317,6 +317,4 @@
 #define __NR_ia32_ppoll			309
 #define __NR_ia32_unshare		310
 
-#define IA32_NR_syscalls 311	/* must be > than biggest syscall! */
-
 #endif /* _ASM_X86_64_IA32_UNISTD_H_ */