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Subject[PATCH 13/20] staging: gasket: gasket_mmap use PAGE_MASK
Date
From: Todd Poynor <toddpoynor@google.com>

gasket_mmap use PAGE_MASK, instead of performing math on PAGE_SIZE, for
simplicity and clarity.

Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
drivers/staging/gasket/gasket_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
index 3cf918f9d2604..ae5febec8844c 100644
--- a/drivers/staging/gasket/gasket_core.c
+++ b/drivers/staging/gasket/gasket_core.c
@@ -1591,7 +1591,7 @@ static int gasket_mmap(struct file *filp, struct vm_area_struct *vma)
}
driver_desc = gasket_dev->internal_desc->driver_desc;

- if (vma->vm_start & (PAGE_SIZE - 1)) {
+ if (vma->vm_start & ~PAGE_MASK) {
gasket_log_error(
gasket_dev, "Base address not page-aligned: 0x%p\n",
(void *)vma->vm_start);
--
2.18.0.233.g985f88cf7e-goog
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