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shmem: SGP_QUICK and SGP_FAULT redundant 

Remove SGP_QUICK from the sgp_type enum: it was for shmem_populate and has no
users now.  Remove SGP_FAULT from the enum: SGP_CACHE does just as well (and
shmem_getpage is about to return with page always locked).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2008-02-04 22:28:43 -08:00 committed by Linus Torvalds
parent 02098feaa4
commit 27d54b398e
1 changed files with 2 additions and 6 deletions
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8
mm/shmem.c
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@ -78,11 +78,9 @@
/* Flag allocation requirements to shmem_getpage and shmem_swp_alloc */
enum sgp_type {
SGP_QUICK, /* don't try more than file page cache lookup */
SGP_READ, /* don't exceed i_size, don't allocate page */
SGP_CACHE, /* don't exceed i_size, may allocate page */
SGP_WRITE, /* may exceed i_size, may allocate page */
SGP_FAULT, /* same as SGP_CACHE, return with page locked */
};
static int shmem_getpage(struct inode *inode, unsigned long idx,
@ -1116,8 +1114,6 @@ static int shmem_getpage(struct inode *inode, unsigned long idx,
if (filepage && PageUptodate(filepage))
goto done;
error = 0;
if (sgp == SGP_QUICK)
goto failed;
gfp = mapping_gfp_mask(mapping);
spin_lock(&info->lock);
@ -1292,7 +1288,7 @@ static int shmem_getpage(struct inode *inode, unsigned long idx,
done:
if (*pagep != filepage) {
*pagep = filepage;
if (sgp != SGP_FAULT)
if (sgp != SGP_CACHE)
unlock_page(filepage);
}
@ -1315,7 +1311,7 @@ static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
if (((loff_t)vmf->pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
return VM_FAULT_SIGBUS;
error = shmem_getpage(inode, vmf->pgoff, &vmf->page, SGP_FAULT, &ret);
error = shmem_getpage(inode, vmf->pgoff, &vmf->page, SGP_CACHE, &ret);
if (error)
return ((error == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS);