From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 4 Oct 2012 03:44:44 +0000 (-0400)
Subject: parisc: switch to generic kernel_execve()
X-Git-Tag: firefly_0821_release~3680^2~1355^2~54^2~10^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4e5ed85ab5f1c9973588d7226c2894016059d9f6;p=firefly-linux-kernel-4.4.55.git

parisc: switch to generic kernel_execve()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index d61de64f990a..447e03c48232 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -995,6 +995,7 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)	\
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
 #define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_KERNEL_EXECVE
 
 #endif /* __ASSEMBLY__ */
 
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 18d05e7373b5..a26917da9b2f 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -741,28 +741,12 @@ ENTRY(ret_from_kernel_thread)
 	ldi	0, %r26
 ENDPROC(ret_from_kernel_thread)
 
-	.import	sys_execve, code
-ENTRY(__execve)
-	copy	%r2, %r15
-	copy	%r30, %r16
-	ldo	PT_SZ_ALGN(%r30), %r30
-	STREG	%r26, PT_GR26(%r16)
-	STREG	%r25, PT_GR25(%r16)
-	STREG	%r24, PT_GR24(%r16)
-#ifdef CONFIG_64BIT
-	ldo	-16(%r30),%r29		/* Reference param save area */
-#endif
-	BL	sys_execve, %r2
-	copy	%r16, %r26
-
-	cmpib,=,n 0,%r28,intr_return    /* forward */
-
-	/* yes, this will trap and die. */
-	copy	%r15, %r2
-	copy	%r16, %r30
-	bv	%r0(%r2)
-	nop
-ENDPROC(__execve)
+ENTRY(ret_from_kernel_execve)
+	mfctl   %cr30, %r1
+	ldo	THREAD_SZ_ALGN(%r1), %r30
+	b	intr_return	/* forward */
+	copy	%r26,%r16	/* pt_regs into r16 */
+ENDPROC(ret_from_kernel_execve)
 
 
 	/*
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index b7b4126774e0..f3f6408bfb4f 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -337,16 +337,6 @@ out:
 	return error;
 }
 
-extern int __execve(const char *filename,
-		    const char *const argv[],
-		    const char *const envp[], struct task_struct *task);
-int kernel_execve(const char *filename,
-		  const char *const argv[],
-		  const char *const envp[])
-{
-	return __execve(filename, argv, envp, current);
-}
-
 unsigned long
 get_wchan(struct task_struct *p)
 {