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[24.9.77.57]) by smtp.googlemail.com with ESMTPSA id t10sm405096ils.36.2021.05.11.11.51.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 11:51:23 -0700 (PDT) From: Jim Cromie To: Jason Baron , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, Jim Cromie Subject: [RFC PATCH v5 04/28] dyndbg: __init iterate over __dyndbg & __dyndbg_site in parallel Date: Tue, 11 May 2021 12:50:33 -0600 Message-Id: <20210511185057.3815777-5-jim.cromie@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210511185057.3815777-1-jim.cromie@gmail.com> References: <20210511185057.3815777-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 7332E138 Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=ht6EjtpH; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf12.hostedemail.com: domain of jimcromie@gmail.com designates 209.85.166.44 as permitted sender) smtp.mailfrom=jimcromie@gmail.com X-Rspamd-Server: rspam03 X-Stat-Signature: bctkokiahe8idbat8sz7swymp8dhg4ab Received-SPF: none (gmail.com>: No applicable sender policy available) receiver=imf12; identity=mailfrom; envelope-from=""; helo=mail-io1-f44.google.com; client-ip=209.85.166.44 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1620759068-620816 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In HEAD~1, a new elf section was added, and dynamic_debug_init() got minimal adjustments; basically s/iter/iter->site/ where needed. Now we rework the for-loop for clarity: . iterate over both sections in parallel (iter & site) . demote iter->site indirection (1st step towards dropping site) . add __(start|stop)___dyndbg_sites decls (init'd in vmlinux.lds.h) . add/rename several iterator/mod_start variables for clarity. . add BUG_ON(iter->site != site) . var rename n to site_ct Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 36 +++++++++++++++++++++++------------- 1 file changed, 23 insertions(+), 13 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index c1c2c90ed944..5a33143215a4 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -41,6 +41,8 @@ extern struct _ddebug __start___dyndbg[]; extern struct _ddebug __stop___dyndbg[]; +extern struct _ddebug_site __start___dyndbg_sites[]; +extern struct _ddebug_site __stop___dyndbg_sites[]; struct ddebug_table { struct list_head link; @@ -118,6 +120,7 @@ do { \ #define vpr_info(fmt, ...) vnpr_info(1, fmt, ##__VA_ARGS__) #define v2pr_info(fmt, ...) vnpr_info(2, fmt, ##__VA_ARGS__) +#define v3pr_info(fmt, ...) vnpr_info(3, fmt, ##__VA_ARGS__) static void vpr_info_dq(const struct ddebug_query *query, const char *msg) { @@ -1086,11 +1089,12 @@ static int __init dynamic_debug_init_control(void) static int __init dynamic_debug_init(void) { - struct _ddebug *iter, *iter_start; + struct _ddebug *iter, *iter_mod_start; + struct _ddebug_site *site, *site_mod_start; const char *modname = NULL; char *cmdline; int ret = 0; - int n = 0, entries = 0, modct = 0; + int site_ct = 0, entries = 0, modct = 0; if (&__start___dyndbg == &__stop___dyndbg) { if (IS_ENABLED(CONFIG_DYNAMIC_DEBUG)) { @@ -1101,23 +1105,29 @@ static int __init dynamic_debug_init(void) ddebug_init_success = 1; return 0; } - iter = __start___dyndbg; - modname = iter->site->modname; - iter_start = iter; - for (; iter < __stop___dyndbg; iter++) { + + iter = iter_mod_start = __start___dyndbg; + site = site_mod_start = __start___dyndbg_sites; + modname = site->modname; + + for (; iter < __stop___dyndbg; iter++, site++) { + + BUG_ON(site != iter->site); entries++; - if (strcmp(modname, iter->site->modname)) { + + if (strcmp(modname, site->modname)) { modct++; - ret = ddebug_add_module(iter_start, n, modname); + ret = ddebug_add_module(iter_mod_start, site_ct, modname); if (ret) goto out_err; - n = 0; - modname = iter->site->modname; - iter_start = iter; + site_ct = 0; + modname = site->modname; + iter_mod_start = iter; + site_mod_start = site; } - n++; + site_ct++; } - ret = ddebug_add_module(iter_start, n, modname); + ret = ddebug_add_module(iter_mod_start, site_ct, modname); if (ret) goto out_err;