Commit 6ae833c7 authored by Tejun Heo's avatar Tejun Heo

percpu: fix how @gfp is interpreted by the percpu allocator

When @gfp is specified, the percpu allocator is interested in whether
it contains all of GFP_KERNEL or not.  If it does, the normal
allocation path is taken; otherwise, the atomic allocation path.
Unfortunately, pcpu_alloc() was incorrectly testing for whether @gfp
contains any part of GFP_KERNEL.

Fix it by testing "(gfp & GFP_KERNEL) != GFP_KERNEL" instead of
"!(gfp & GFP_KERNEL)" to decide whether the allocation should be
atomic or not.
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 17497acb
...@@ -876,7 +876,7 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved, ...@@ -876,7 +876,7 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved,
static int warn_limit = 10; static int warn_limit = 10;
struct pcpu_chunk *chunk; struct pcpu_chunk *chunk;
const char *err; const char *err;
bool is_atomic = !(gfp & GFP_KERNEL); bool is_atomic = (gfp & GFP_KERNEL) != GFP_KERNEL;
int occ_pages = 0; int occ_pages = 0;
int slot, off, new_alloc, cpu, ret; int slot, off, new_alloc, cpu, ret;
unsigned long flags; unsigned long flags;
......
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