From e17f0d4cc006265dd92129db4bf9da3a2e4a4f66 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 3 Feb 2026 17:33:15 +0100 Subject: [PATCH] scsi: buslogic: Reduce stack usage Some randconfig builds run into excessive stack usage with gcc-14 or higher, which use __attribute__((cold)) where earlier versions did not do that: drivers/scsi/BusLogic.c: In function 'blogic_init': drivers/scsi/BusLogic.c:2398:1: error: the frame size of 1680 bytes is larger than 1536 bytes [-Werror=frame-larger-than=] The problem is that a lot of code gets inlined into blogic_init() here. Two functions stick out, but they are a bit different: - blogic_init_probeinfo_list() actually uses a few hundred bytes of kernel stack, which is a problem in combination with other functions that also do. Marking this one as noinline means that the stack slots get get reused between function calls - blogic_reportconfig() has a few large variables, but whenever it is not inlined into its caller, the compiler is actually smart enough to reuse stack slots for these automatically, so marking it as noinline saves most of the stack space by itself. The combination of both of these should avoid the problem entirely. Signed-off-by: Arnd Bergmann Link: https://patch.msgid.link/20260203163321.2598593-1-arnd@kernel.org Signed-off-by: Martin K. Petersen --- drivers/scsi/BusLogic.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c index 865fcbac8fa1..49929d0339fa 100644 --- a/drivers/scsi/BusLogic.c +++ b/drivers/scsi/BusLogic.c @@ -920,7 +920,8 @@ static int __init blogic_init_fp_probeinfo(struct blogic_adapter *adapter) a particular probe order. */ -static void __init blogic_init_probeinfo_list(struct blogic_adapter *adapter) +static noinline_for_stack void __init +blogic_init_probeinfo_list(struct blogic_adapter *adapter) { /* If a PCI BIOS is present, interrogate it for MultiMaster and @@ -1690,7 +1691,8 @@ common: blogic_reportconfig reports the configuration of Host Adapter. */ -static bool __init blogic_reportconfig(struct blogic_adapter *adapter) +static noinline_for_stack bool __init +blogic_reportconfig(struct blogic_adapter *adapter) { unsigned short alltgt_mask = (1 << adapter->maxdev) - 1; unsigned short sync_ok, fast_ok; -- 2.47.3