Instead of dividing count by rwsize, use ALIGN_DOWN() and change the
loop to decrement by "rwsize" bytes.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
fs/devfs-core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/devfs-core.c b/fs/devfs-core.c
index 37c4bd0ad..8d5ff71d6 100644
--- a/fs/devfs-core.c
+++ b/fs/devfs-core.c
@@ -548,9 +548,9 @@ static ssize_t mem_copy(struct device_d *dev, void *dst, const void *src,
rwsize = rwsize >> O_RWSIZE_SHIFT;
- count /= rwsize;
+ count = ALIGN_DOWN(count, rwsize);
- while (count-- > 0) {
+ while (count) {
switch (rwsize) {
case 1:
*((u8 *)dst) = *((u8 *)src);
@@ -567,6 +567,7 @@ static ssize_t mem_copy(struct device_d *dev, void *dst, const void *src,
}
dst += rwsize;
src += rwsize;
+ count -= rwsize;
}
out:
return size;
--
2.20.1
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