From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59492) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fORBa-0006Rm-4M for qemu-devel@nongnu.org; Thu, 31 May 2018 13:16:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fORBY-0004F0-Be for qemu-devel@nongnu.org; Thu, 31 May 2018 13:16:26 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:57518 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fORBY-0004EC-6V for qemu-devel@nongnu.org; Thu, 31 May 2018 13:16:24 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CF1E77D83A for ; Thu, 31 May 2018 17:16:23 +0000 (UTC) Received: from donizetti.redhat.com (ovpn-117-47.ams2.redhat.com [10.36.117.47]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5BED563F50 for ; Thu, 31 May 2018 17:16:23 +0000 (UTC) From: Paolo Bonzini Date: Thu, 31 May 2018 19:16:06 +0200 Message-Id: <20180531171606.21604-15-pbonzini@redhat.com> In-Reply-To: <20180531171606.21604-1-pbonzini@redhat.com> References: <20180531171253.21012-1-pbonzini@redhat.com> <20180531171606.21604-1-pbonzini@redhat.com> Subject: [Qemu-devel] [PULL 53/53] memory: Make operations using MemoryRegionIoeventfd struct pass by pointer. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org From: Tristan Burgess This changes the functions memory_region_ioeventfd_equal, memory_region_ioeventfd_before, and their callers, to pass the MemoryRegionIoeventfd struct via pointer, instead of directly passing the struct. This saves on stack space and is considered safe practice. Signed-off-by: Tristan Burgess Message-Id: <20180529030445.177867-1-tburgessdev@gmail.com> Fixes: Launchpad bug 1720969 Signed-off-by: Paolo Bonzini --- memory.c | 44 ++++++++++++++++++++++---------------------- 1 file changed, 22 insertions(+), 22 deletions(-) diff --git a/memory.c b/memory.c index e4f484b73e..af88b12bab 100644 --- a/memory.c +++ b/memory.c @@ -172,38 +172,38 @@ struct MemoryRegionIoeventfd { EventNotifier *e; }; -static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a, - MemoryRegionIoeventfd b) +static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd *a, + MemoryRegionIoeventfd *b) { - if (int128_lt(a.addr.start, b.addr.start)) { + if (int128_lt(a->addr.start, b->addr.start)) { return true; - } else if (int128_gt(a.addr.start, b.addr.start)) { + } else if (int128_gt(a->addr.start, b->addr.start)) { return false; - } else if (int128_lt(a.addr.size, b.addr.size)) { + } else if (int128_lt(a->addr.size, b->addr.size)) { return true; - } else if (int128_gt(a.addr.size, b.addr.size)) { + } else if (int128_gt(a->addr.size, b->addr.size)) { return false; - } else if (a.match_data < b.match_data) { + } else if (a->match_data < b->match_data) { return true; - } else if (a.match_data > b.match_data) { + } else if (a->match_data > b->match_data) { return false; - } else if (a.match_data) { - if (a.data < b.data) { + } else if (a->match_data) { + if (a->data < b->data) { return true; - } else if (a.data > b.data) { + } else if (a->data > b->data) { return false; } } - if (a.e < b.e) { + if (a->e < b->e) { return true; - } else if (a.e > b.e) { + } else if (a->e > b->e) { return false; } return false; } -static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a, - MemoryRegionIoeventfd b) +static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd *a, + MemoryRegionIoeventfd *b) { return !memory_region_ioeventfd_before(a, b) && !memory_region_ioeventfd_before(b, a); @@ -788,8 +788,8 @@ static void address_space_add_del_ioeventfds(AddressSpace *as, while (iold < fds_old_nb || inew < fds_new_nb) { if (iold < fds_old_nb && (inew == fds_new_nb - || memory_region_ioeventfd_before(fds_old[iold], - fds_new[inew]))) { + || memory_region_ioeventfd_before(&fds_old[iold], + &fds_new[inew]))) { fd = &fds_old[iold]; section = (MemoryRegionSection) { .fv = address_space_to_flatview(as), @@ -801,8 +801,8 @@ static void address_space_add_del_ioeventfds(AddressSpace *as, ++iold; } else if (inew < fds_new_nb && (iold == fds_old_nb - || memory_region_ioeventfd_before(fds_new[inew], - fds_old[iold]))) { + || memory_region_ioeventfd_before(&fds_new[inew], + &fds_old[iold]))) { fd = &fds_new[inew]; section = (MemoryRegionSection) { .fv = address_space_to_flatview(as), @@ -1440,7 +1440,7 @@ static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr, ioeventfd.match_data = mr->ioeventfds[i].match_data; ioeventfd.e = mr->ioeventfds[i].e; - if (memory_region_ioeventfd_equal(ioeventfd, mr->ioeventfds[i])) { + if (memory_region_ioeventfd_equal(&ioeventfd, &mr->ioeventfds[i])) { event_notifier_set(ioeventfd.e); return true; } @@ -2210,7 +2210,7 @@ void memory_region_add_eventfd(MemoryRegion *mr, } memory_region_transaction_begin(); for (i = 0; i < mr->ioeventfd_nb; ++i) { - if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) { + if (memory_region_ioeventfd_before(&mrfd, &mr->ioeventfds[i])) { break; } } @@ -2245,7 +2245,7 @@ void memory_region_del_eventfd(MemoryRegion *mr, } memory_region_transaction_begin(); for (i = 0; i < mr->ioeventfd_nb; ++i) { - if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) { + if (memory_region_ioeventfd_equal(&mrfd, &mr->ioeventfds[i])) { break; } } -- 2.17.0