Date: Wed, 19 Dec 2018 04:54:32 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r342214 - in head/sys: conf dev/fxp modules/fxp Message-ID: <201812190454.wBJ4sWJ2005072@repo.freebsd.org>
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Author: markj Date: Wed Dec 19 04:54:32 2018 New Revision: 342214 URL: https://svnweb.freebsd.org/changeset/base/342214 Log: Remove a use of a negative array index from fxp(4). This fixes a warning seen when compiling amd64 GENERIC with clang 7. Also remove the workaround added in r337324. clang 7 and gcc 4.2 generate the same code with or without the code change. Reviewed by: imp (previous version) MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D18603 Modified: head/sys/conf/files head/sys/conf/kern.mk head/sys/dev/fxp/if_fxp.c head/sys/dev/fxp/if_fxpreg.h head/sys/modules/fxp/Makefile Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Wed Dec 19 03:23:23 2018 (r342213) +++ head/sys/conf/files Wed Dec 19 04:54:32 2018 (r342214) @@ -1782,8 +1782,7 @@ dev/flash/cqspi.c optional cqspi fdt xdma dev/flash/mx25l.c optional mx25l dev/flash/n25q.c optional n25q fdt dev/flash/qspi_if.m optional cqspi fdt | n25q fdt -dev/fxp/if_fxp.c optional fxp \ - compile-with "${NORMAL_C} ${NO_WARRAY_BOUNDS}" +dev/fxp/if_fxp.c optional fxp dev/fxp/inphy.c optional fxp dev/gem/if_gem.c optional gem dev/gem/if_gem_pci.c optional gem pci Modified: head/sys/conf/kern.mk ============================================================================== --- head/sys/conf/kern.mk Wed Dec 19 03:23:23 2018 (r342213) +++ head/sys/conf/kern.mk Wed Dec 19 04:54:32 2018 (r342214) @@ -25,7 +25,6 @@ NO_WUNNEEDED_INTERNAL_DECL= -Wno-error-unneeded-intern NO_WSOMETIMES_UNINITIALIZED= -Wno-error-sometimes-uninitialized NO_WCAST_QUAL= -Wno-error-cast-qual NO_WTAUTOLOGICAL_POINTER_COMPARE= -Wno-tautological-pointer-compare -NO_WARRAY_BOUNDS= -Wno-error-array-bounds # Several other warnings which might be useful in some cases, but not severe # enough to error out the whole kernel build. Display them anyway, so there is # some incentive to fix them eventually. Modified: head/sys/dev/fxp/if_fxp.c ============================================================================== --- head/sys/dev/fxp/if_fxp.c Wed Dec 19 03:23:23 2018 (r342213) +++ head/sys/dev/fxp/if_fxp.c Wed Dec 19 04:54:32 2018 (r342214) @@ -1627,7 +1627,7 @@ fxp_encap(struct fxp_softc *sc, struct mbuf **m_head) cbp->tbd_number = nseg; /* Configure TSO. */ if (m->m_pkthdr.csum_flags & CSUM_TSO) { - cbp->tbd[-1].tb_size = htole32(m->m_pkthdr.tso_segsz << 16); + cbp->tbdtso.tb_size = htole32(m->m_pkthdr.tso_segsz << 16); cbp->tbd[1].tb_size |= htole32(tcp_payload << 16); cbp->ipcb_ip_schedule |= FXP_IPCB_LARGESEND_ENABLE | FXP_IPCB_IP_CHECKSUM_ENABLE | Modified: head/sys/dev/fxp/if_fxpreg.h ============================================================================== --- head/sys/dev/fxp/if_fxpreg.h Wed Dec 19 03:23:23 2018 (r342213) +++ head/sys/dev/fxp/if_fxpreg.h Wed Dec 19 04:54:32 2018 (r342214) @@ -281,10 +281,15 @@ struct fxp_cb_tx { uint16_t cb_status; uint16_t cb_command; uint32_t link_addr; - uint32_t tbd_array_addr; - uint16_t byte_count; - uint8_t tx_threshold; - uint8_t tbd_number; + union { + struct { + uint32_t tbd_array_addr; + uint16_t byte_count; + uint8_t tx_threshold; + uint8_t tbd_number; + }; + struct fxp_tbd tbdtso; + }; /* * The following structure isn't actually part of the TxCB, Modified: head/sys/modules/fxp/Makefile ============================================================================== --- head/sys/modules/fxp/Makefile Wed Dec 19 03:23:23 2018 (r342213) +++ head/sys/modules/fxp/Makefile Wed Dec 19 04:54:32 2018 (r342214) @@ -6,5 +6,3 @@ KMOD= if_fxp SRCS= device_if.h bus_if.h if_fxp.c inphy.c miibus_if.h miidevs.h pci_if.h .include <bsd.kmod.mk> - -CWARNFLAGS+= ${NO_WARRAY_BOUNDS}
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