Commit e8c4f6ee authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Peter Zijlstra
Browse files

perf: Remove redundant condition for AUX buffer size 



It is already checked whether the VMA size is the same as
nr_pages * PAGE_SIZE, so later checking both:

      aux_size == vma_size && aux_size == nr_pages * PAGE_SIZE

is redundant. Remove the vma_size check as nr_pages is what is actually
used in the allocation function. That prepares for splitting out the buffer
allocation into separate functions, so that only nr_pages needs to be
handed in.

No functional change.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarLorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://lore.kernel.org/r/20250812104018.424519320@infradead.org
parent 8f5ae30d

kernel/events/core.c

+1 −1
Original line number Diff line number Diff line
@@ -7043,7 +7043,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma) 
		if (rb_has_aux(rb) && rb->aux_pgoff != vma->vm_pgoff)

			goto aux_unlock;



		if (aux_size != vma_size || aux_size != nr_pages * PAGE_SIZE)

		if (aux_size != nr_pages * PAGE_SIZE)

			goto aux_unlock;



		/* already mapped with a different size */