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'gap' is unsigned, so this code is wrong:
gap = -new_head;
...
if (gap > 0) { ... }
Make 'gap' signed.
The semantic patch that finds this problem (many false-positive results):
(http://coccinelle.lip6.fr/)
// <smpl>
@ r1 @
identifier f;
@@
int f(...) { ... }
@@
identifier r1.f;
type T;
unsigned T x;
@@
*x = f(...)
...
*x > 0
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8e64159dfb