From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, torvic9@mailbox.org,
Paolo Bonzini <pbonzini@redhat.com>,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH 5.15 01/26] KVM: x86: avoid warning with -Wbitwise-instead-of-logical
Date: Wed, 10 Nov 2021 19:44:00 +0100 [thread overview]
Message-ID: <20211110182003.757795469@linuxfoundation.org> (raw)
In-Reply-To: <20211110182003.700594531@linuxfoundation.org>
From: Paolo Bonzini <pbonzini@redhat.com>
commit 3d5e7a28b1ea2d603dea478e58e37ce75b9597ab upstream.
This is a new warning in clang top-of-tree (will be clang 14):
In file included from arch/x86/kvm/mmu/mmu.c:27:
arch/x86/kvm/mmu/spte.h:318:9: error: use of bitwise '|' with boolean operands [-Werror,-Wbitwise-instead-of-logical]
return __is_bad_mt_xwr(rsvd_check, spte) |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
||
arch/x86/kvm/mmu/spte.h:318:9: note: cast one or both operands to int to silence this warning
The code is fine, but change it anyway to shut up this clever clogs
of a compiler.
Reported-by: torvic9@mailbox.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/mmu/spte.h | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/arch/x86/kvm/mmu/spte.h
+++ b/arch/x86/kvm/mmu/spte.h
@@ -310,12 +310,7 @@ static inline bool __is_bad_mt_xwr(struc
static __always_inline bool is_rsvd_spte(struct rsvd_bits_validate *rsvd_check,
u64 spte, int level)
{
- /*
- * Use a bitwise-OR instead of a logical-OR to aggregate the reserved
- * bits and EPT's invalid memtype/XWR checks to avoid an extra Jcc
- * (this is extremely unlikely to be short-circuited as true).
- */
- return __is_bad_mt_xwr(rsvd_check, spte) |
+ return __is_bad_mt_xwr(rsvd_check, spte) ||
__is_rsvd_bits_set(rsvd_check, spte, level);
}
next prev parent reply other threads:[~2021-11-10 18:56 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-10 18:43 [PATCH 5.15 00/26] 5.15.2-rc1 review Greg Kroah-Hartman
2021-11-10 18:44 ` Greg Kroah-Hartman [this message]
2021-11-10 18:44 ` [PATCH 5.15 02/26] Revert "x86/kvm: fix vcpu-id indexed array sizes" Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 03/26] usb: ehci: handshake CMD_RUN instead of STS_HALT Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 04/26] usb: gadget: Mark USB_FSL_QE broken on 64-bit Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 05/26] usb: musb: Balance list entry in musb_gadget_queue Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 06/26] usb-storage: Add compatibility quirk flags for iODD 2531/2541 Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 07/26] Revert "proc/wchan: use printk format instead of lookup_symbol_name()" Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 08/26] binder: use euid from cred instead of using task Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 09/26] binder: use cred instead of task for selinux checks Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 10/26] binder: use cred instead of task for getsecid Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 11/26] binder: dont detect sender/target during buffer cleanup Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 12/26] kfence: always use static branches to guard kfence_alloc() Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 13/26] kfence: default to dynamic branch instead of static keys mode Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 14/26] btrfs: fix lzo_decompress_bio() kmap leakage Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 15/26] staging: rtl8712: fix use-after-free in rtl8712_dl_fw Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 16/26] isofs: Fix out of bound access for corrupted isofs image Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 17/26] comedi: dt9812: fix DMA buffers on stack Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 18/26] comedi: ni_usb6501: fix NULL-deref in command paths Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 19/26] comedi: vmk80xx: fix transfer-buffer overflows Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 20/26] comedi: vmk80xx: fix bulk-buffer overflow Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 21/26] comedi: vmk80xx: fix bulk and interrupt message timeouts Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 22/26] staging: r8712u: fix control-message timeout Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 23/26] staging: rtl8192u: fix control-message timeouts Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 24/26] staging: r8188eu: fix memleak in rtw_wx_set_enc_ext Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 25/26] media: staging/intel-ipu3: css: Fix wrong size comparison imgu_css_fw_init Greg Kroah-Hartman
2021-11-10 18:44 ` [PATCH 5.15 26/26] rsi: fix control-message timeout Greg Kroah-Hartman
2021-11-10 23:43 ` [PATCH 5.15 00/26] 5.15.2-rc1 review Florian Fainelli
2021-11-11 9:57 ` Naresh Kamboju
2021-11-11 16:26 ` Shuah Khan
2021-11-11 16:37 ` Fox Chen
2021-11-12 0:59 ` Guenter Roeck
2021-11-12 15:46 ` Jon Hunter
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