[uml-devel] [patch] restore do_mmap_pgoff() semantics

[Gerd Knorr <kraxel@bytesex.org>]

  Hi,

This patch makes do_mmap_pgoff behave as usual and intruduces a
new __do_mmap_pgoff function with the additional struct mm_struct
argument for the callers which need it.

Point of doing that is to allow a kernel tree with uml patch applied
still build non-uml kernels.

  Gerd

diff -u linux-2.6.0-test3/arch/um/kernel/syscall_kern.c linux/arch/um/kernel/syscall_kern.c
--- linux-2.6.0-test3/arch/um/kernel/syscall_kern.c	2003-08-22 09:41:46.000000000 +0000
+++ linux/arch/um/kernel/syscall_kern.c	2003-08-22 09:42:05.000000000 +0000
@@ -81,7 +81,7 @@
 	}
 
 	down_write(&mm->mmap_sem);
-	error = do_mmap_pgoff(mm, file, addr, len, prot, flags, pgoff);
+	error = __do_mmap_pgoff(mm, file, addr, len, prot, flags, pgoff);
 	up_write(&mm->mmap_sem);
 
 	if (file)
diff -u linux-2.6.0-test3/include/linux/mm.h linux/include/linux/mm.h
--- linux-2.6.0-test3/include/linux/mm.h	2003-08-22 08:36:13.000000000 +0000
+++ linux/include/linux/mm.h	2003-08-22 09:40:09.000000000 +0000
@@ -516,10 +516,18 @@
 
 extern unsigned long get_unmapped_area(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
 
-extern unsigned long do_mmap_pgoff(struct mm_struct *mm, struct file *file, 
-				   unsigned long addr, unsigned long len,
-				   unsigned long prot, unsigned long flag,
-				   unsigned long pgoff);
+extern unsigned long __do_mmap_pgoff(struct mm_struct *mm,
+	struct file *file, unsigned long addr,
+	unsigned long len, unsigned long prot,
+	unsigned long flag, unsigned long pgoff);
+
+static inline unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
+	unsigned long len, unsigned long prot,
+	unsigned long flag, unsigned long pgoff)
+{
+	return __do_mmap_pgoff(current->mm, file, addr, len,
+		               prot, flag, pgoff);
+}
 
 static inline unsigned long do_mmap(struct file *file, unsigned long addr,
 	unsigned long len, unsigned long prot,
@@ -529,8 +537,7 @@
 	if ((offset + PAGE_ALIGN(len)) < offset)
 		goto out;
 	if (!(offset & ~PAGE_MASK))
-		ret = do_mmap_pgoff(current->mm, file, addr, len, prot, flag, 
-				    offset >> PAGE_SHIFT);
+		ret = do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
 out:
 	return ret;
 }
diff -u linux-2.6.0-test3/mm/mmap.c linux/mm/mmap.c
--- linux-2.6.0-test3/mm/mmap.c	2003-08-22 09:52:40.000000000 +0000
+++ linux/mm/mmap.c	2003-08-22 09:52:48.000000000 +0000
@@ -457,7 +457,7 @@
  * The caller must hold down_write(current->mm->mmap_sem).
  */
 
-unsigned long do_mmap_pgoff(struct mm_struct *mm, struct file * file, 
+unsigned long __do_mmap_pgoff(struct mm_struct *mm, struct file * file, 
 			    unsigned long addr, unsigned long len,
 			    unsigned long prot, unsigned long flags,
 			    unsigned long pgoff)


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