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Message-ID: <201803280107.bZw8jIAt%fengguang.wu@intel.com>
Date: Wed, 28 Mar 2018 02:39:15 +0800
From: kbuild test robot <lkp@...el.com>
To: Kees Cook <keescook@...omium.org>
Cc: kbuild-all@...org, Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Martin Uecker <Martin.Uecker@....uni-goettingen.de>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Randy Dunlap <rdunlap@...radead.org>,
Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
Ingo Molnar <mingo@...nel.org>,
David Laight <David.Laight@...lab.com>,
Ian Abbott <abbotti@....co.uk>, linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v6] kernel.h: Retain constant expression output for
max()/min()
Hi Kees,
I love your patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v4.16-rc7 next-20180327]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Kees-Cook/kernel-h-Retain-constant-expression-output-for-max-min/20180327-110916
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
vim +124 drivers/infiniband/hw/vmw_pvrdma/pvrdma_doorbell.c
29c8d9eb Adit Ranadive 2016-10-02 114
29c8d9eb Adit Ranadive 2016-10-02 115 void pvrdma_uar_free(struct pvrdma_dev *dev, struct pvrdma_uar_map *uar)
29c8d9eb Adit Ranadive 2016-10-02 116 {
29c8d9eb Adit Ranadive 2016-10-02 117 struct pvrdma_id_table *tbl = &dev->uar_table.tbl;
29c8d9eb Adit Ranadive 2016-10-02 118 unsigned long flags;
29c8d9eb Adit Ranadive 2016-10-02 119 u32 obj;
29c8d9eb Adit Ranadive 2016-10-02 120
29c8d9eb Adit Ranadive 2016-10-02 121 obj = uar->index & (tbl->max - 1);
29c8d9eb Adit Ranadive 2016-10-02 122 spin_lock_irqsave(&tbl->lock, flags);
29c8d9eb Adit Ranadive 2016-10-02 123 clear_bit(obj, tbl->table);
29c8d9eb Adit Ranadive 2016-10-02 @124 tbl->last = min(tbl->last, obj);
:::::: The code at line 124 was first introduced by commit
:::::: 29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 IB: Add vmw_pvrdma driver
:::::: TO: Adit Ranadive <aditr@...are.com>
:::::: CC: Doug Ledford <dledford@...hat.com>
---
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