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Subject[PATCH] staging: gasket: Convert get_user_pages*() --> pin_user_pages*()
Date
In 2019, we introduced pin_user_pages*() and now we are converting
get_user_pages*() to the new API as appropriate. [1] & [2] could
be referred for more information.

[1] Documentation/core-api/pin_user_pages.rst

[2] "Explicit pinning of user-space pages":
https://lwn.net/Articles/807108/

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>

---
Hi,

I'm compile tested this, but unable to run-time test, so any testing
help is much appriciated.

drivers/staging/gasket/gasket_page_table.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index f6d7157..d712ad4 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -449,7 +449,7 @@ static bool gasket_release_page(struct page *page)

if (!PageReserved(page))
SetPageDirty(page);
- put_page(page);
+ unpin_user_page(page);

return true;
}
@@ -486,12 +486,12 @@ static int gasket_perform_mapping(struct gasket_page_table *pg_tbl,
ptes[i].dma_addr = pg_tbl->coherent_pages[0].paddr +
off + i * PAGE_SIZE;
} else {
- ret = get_user_pages_fast(page_addr - offset, 1,
+ ret = pin_user_pages_fast(page_addr - offset, 1,
FOLL_WRITE, &page);

if (ret <= 0) {
dev_err(pg_tbl->device,
- "get user pages failed for addr=0x%lx, offset=0x%lx [ret=%d]\n",
+ "pin user pages failed for addr=0x%lx, offset=0x%lx [ret=%d]\n",
page_addr, offset, ret);
return ret ? ret : -ENOMEM;
}
--
1.9.1
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