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[PATCH] Uninline sys_mmap common code (reduce binary size)

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Remove the inlining of the new vs old mmap system call common code.  This
reduces the size of the resulting vmlinux for defconfig as follows:

mb@pc1:~/develop/git/linux-2.6$ size vmlinux.mmap*
   text    data     bss     dec     hex filename
3303749  521524  186564 4011837  3d373d vmlinux.mmapinline
3303557  521524  186564 4011645  3d367d vmlinux.mmapnoinline

The new sys_mmap2() has also one function call overhead removed, now.
(probably it was already optimized to a jmp before, but anyway...)

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Michael Buesch 2006-03-22 00:08:44 -08:00 committed by Linus Torvalds
parent 617d2214ee
commit a7290ee08e
1 changed files with 9 additions and 16 deletions
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25
arch/i386/kernel/sys_i386.c
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@ -40,14 +40,13 @@ asmlinkage int sys_pipe(unsigned long __user * fildes)
return error;
}
/* common code for old and new mmaps */
static inline long do_mmap2(
unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
int error = -EBADF;
struct file * file = NULL;
struct file *file = NULL;
struct mm_struct *mm = current->mm;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
if (!(flags & MAP_ANONYMOUS)) {
@ -56,9 +55,9 @@ static inline long do_mmap2(
goto out;
}
down_write(&current->mm->mmap_sem);
down_write(&mm->mmap_sem);
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(&current->mm->mmap_sem);
up_write(&mm->mmap_sem);
if (file)
fput(file);
@ -66,13 +65,6 @@ static inline long do_mmap2(
return error;
}
asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
return do_mmap2(addr, len, prot, flags, fd, pgoff);
}
/*
* Perform the select(nd, in, out, ex, tv) and mmap() system
* calls. Linux/i386 didn't use to be able to handle more than
@ -101,7 +93,8 @@ asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
if (a.offset & ~PAGE_MASK)
goto out;
err = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
err = sys_mmap2(a.addr, a.len, a.prot, a.flags,
a.fd, a.offset >> PAGE_SHIFT);
out:
return err;
}