shmem_zero_setup

Name:shmem_zero_setup - setup a shared anonymous mapping*@vma: the vma to be mmapped is prepared by do_mmap_pgoff

Proto:int shmem_zero_setup(struct vm_area_struct *vma)

Type:int

Parameter:

Type	Parameter	Name
struct vm_area_struct *	vma

4174

size = The first byte after our end addresswithin vm_mm. - Our start address within vm_mm.

4182

file = shmem_kernel_file_setup - get an unlinked file living in tmpfs which must be* kernel internal. There will be NO LSM permission checks against the* underlying inode. So users of this interface must do LSM checks at a* higher layer

4183

If IS_ERR(file) Then Return PTR_ERR(file)

4186

If File we map to (can be NULL). Then fput(File we map to (can be NULL). )

4188

File we map to (can be NULL). = file

4189

Function pointers to deal with this struct. = shmem_vm_ops

4191

If IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',* 0 otherwise.(CONFIG_TRANSPARENT_HUGE_PAGECACHE) && ( Our start address within vm_mm. + ~HPAGE_PMD_MASK & HPAGE_PMD_MASK) < (The first byte after our end addresswithin vm_mm. & HPAGE_PMD_MASK) Then

4194

khugepaged_enter(vma, Flags, see mm.h. )

4197

Return 0

**Caller**
Name	Describe
mmap_region

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