[PATCH] rcu: fix typo "upto" in comment

[Hemanth Selam <hemanth.selam@gmail.com>]

Correct "upto" to "up to", reported by scripts/checkpatch.pl using the
misspelling list in scripts/spelling.txt.  Only touches comments, no code
changes.

Assisted-by: Cursor:claude-opus-5
Signed-off-by: Hemanth Selam <hemanth.selam@gmail.com>
---
 kernel/rcu/srcutree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c
index ed204b3f4b84..01f19bb17dd6 100644
--- a/kernel/rcu/srcutree.c
+++ b/kernel/rcu/srcutree.c
@@ -624,7 +624,7 @@ module_param(srcu_retry_check_delay, ulong, 0444);
 #define SRCU_UL_CLAMP_LO(val, low)	((val) > (low) ? (val) : (low))
 #define SRCU_UL_CLAMP_HI(val, high)	((val) < (high) ? (val) : (high))
 #define SRCU_UL_CLAMP(val, low, high)	SRCU_UL_CLAMP_HI(SRCU_UL_CLAMP_LO((val), (low)), (high))
-// per-GP-phase no-delay instances adjusted to allow non-sleeping poll upto
+// per-GP-phase no-delay instances adjusted to allow non-sleeping poll up to
 // one jiffies time duration. Mult by 2 is done to factor in the srcu_get_delay()
 // called from process_srcu().
 #define SRCU_DEFAULT_MAX_NODELAY_PHASE_ADJUSTED	\
-- 
2.48.1