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mm/shm: Convert bytes to pages by MM_NPAGES instead of MM_PGALIGNUP

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Xiang Xiao 2019-01-26 10:11:06 -06:00 committed by Gregory Nutt
parent b507fe9606
commit b5e2754d2d
3 changed files with 5 additions and 5 deletions
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2
mm/shm/shmat.c
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@ -153,7 +153,7 @@ FAR void *shmat(int shmid, FAR const void *shmaddr, int shmflg)
/* Convert the region size to pages */ /* Convert the region size to pages */
npages = MM_PGALIGNUP(region->sr_ds.shm_segsz); npages = MM_NPAGES(region->sr_ds.shm_segsz);
/* Attach, i.e, map, on shared memory region to the user virtual address. */ /* Attach, i.e, map, on shared memory region to the user virtual address. */

2
mm/shm/shmdt.c
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@ -132,7 +132,7 @@ int shmdt(FAR const void *shmaddr)
/* Convert the region size to pages */ /* Convert the region size to pages */
npages = MM_PGALIGNUP(region->sr_ds.shm_segsz); npages = MM_NPAGES(region->sr_ds.shm_segsz);
/* Detach, i.e, unmap, on shared memory region from a user virtual /* Detach, i.e, unmap, on shared memory region from a user virtual
* address. * address.

6
mm/shm/shmget.c
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@ -173,11 +173,11 @@ static int shm_extend(int shmid, size_t size)
/* This is the number of pages that are needed to satisfy the allocation */ /* This is the number of pages that are needed to satisfy the allocation */
pgneeded = MM_PGALIGNUP(size); pgneeded = MM_NPAGES(size);
/* This is the number of pages that have already been allocated */ /* This is the number of pages that have already been allocated */
pgalloc = MM_PGALIGNUP(region->sr_ds.shm_segsz); pgalloc = MM_NPAGES(region->sr_ds.shm_segsz);
/* Loop until all pages have been allocated (or something bad happens) */ /* Loop until all pages have been allocated (or something bad happens) */
@ -192,7 +192,7 @@ static int shm_extend(int shmid, size_t size)
break; break;
} }
/* Increment the number of pages successully allocated */ /* Increment the number of pages successfully allocated */
pgalloc++; pgalloc++;
} }