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Simplify the control flow and tidy up a comment in map_insert.

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In collaboration with:	kib
MFC after:	1 week
This commit is contained in:
Alan Cox 2017-03-11 18:57:13 +00:00
parent b1303ffeb2
commit e383e820d3
1 changed files with 39 additions and 42 deletions
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21
sys/kern/imgact_elf.c
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@ -456,11 +456,12 @@ __elfN(map_insert)(struct image_params *imgp, vm_map_t map, vm_object_t object,
return (rv);
end = trunc_page(end);
}
if (end > start) {
if (offset & PAGE_MASK) {
if (start >= end)
return (KERN_SUCCESS);
if ((offset & PAGE_MASK) != 0) {
/*
* The mapping is not page aligned. This means we have
* to copy the data. Sigh.
* The mapping is not page aligned. This means that we have
* to copy the data.
*/
rv = vm_map_fixed(map, NULL, 0, start, end - start,
prot | VM_PROT_WRITE, VM_PROT_ALL, MAP_CHECK_EXCL);
@ -483,23 +484,19 @@ __elfN(map_insert)(struct image_params *imgp, vm_map_t map, vm_object_t object,
return (KERN_FAILURE);
offset += sz;
}
rv = KERN_SUCCESS;
} else {
vm_object_reference(object);
rv = vm_map_fixed(map, object, offset, start,
end - start, prot, VM_PROT_ALL,
cow | MAP_CHECK_EXCL);
rv = vm_map_fixed(map, object, offset, start, end - start,
prot, VM_PROT_ALL, cow | MAP_CHECK_EXCL);
if (rv != KERN_SUCCESS) {
locked = VOP_ISLOCKED(imgp->vp);
VOP_UNLOCK(imgp->vp, 0);
vm_object_deallocate(object);
vn_lock(imgp->vp, locked | LK_RETRY);
}
}
return (rv);
} else {
return (KERN_SUCCESS);
}
}
return (KERN_SUCCESS);
}
static int