author: Ralph Campbell <rcampbell@nvidia.com> 2020-10-13 16:54:32 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2020-10-13 18:38:32 -0700
commit: 9b53122f616a74ddbbd6c97a3c8294c631a13d15
parent: bfe18a0900f1188e323d3f2c3cd2d6dfe2d0789c
Commit Summary:
Diffstat:
1 file changed, 0 insertions, 14 deletions
diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index c710b4c5714d..e151a7f10519 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -36,7 +36,6 @@
static const struct dev_pagemap_ops dmirror_devmem_ops;
static const struct mmu_interval_notifier_ops dmirror_min_ops;
static dev_t dmirror_dev;
-static struct page *dmirror_zero_page;
struct dmirror_device;
@@ -1127,17 +1126,6 @@ static int __init hmm_dmirror_init(void)
goto err_chrdev;
}
- /*
- * Allocate a zero page to simulate a reserved page of device private
- * memory which is always zero. The zero_pfn page isn't used just to
- * make the code here simpler (i.e., we need a struct page for it).
- */
- dmirror_zero_page = alloc_page(GFP_HIGHUSER | __GFP_ZERO);
- if (!dmirror_zero_page) {
- ret = -ENOMEM;
- goto err_chrdev;
- }
-
pr_info("HMM test module loaded. This is only for testing HMM.\n");
return 0;
@@ -1153,8 +1141,6 @@ static void __exit hmm_dmirror_exit(void)
{
int id;
- if (dmirror_zero_page)
- __free_page(dmirror_zero_page);
for (id = 0; id < DMIRROR_NDEVICES; id++)
dmirror_device_remove(dmirror_devices + id);
unregister_chrdev_region(dmirror_dev, DMIRROR_NDEVICES);