From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: Masahiro Yamada <masahiroy@kernel.org>
Subject: [PATCH 18/37] modpost: invoke modpost only when input files are updated
Date: Mon, 1 Jun 2020 14:57:12 +0900 [thread overview]
Message-ID: <20200601055731.3006266-18-masahiroy@kernel.org> (raw)
In-Reply-To: <20200601055731.3006266-1-masahiroy@kernel.org>
Currently, the second pass of modpost is always invoked when you run
'make' or 'make modules' even if none of modules is changed.
Use if_changed to invoke it only when it is necessary.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
scripts/Makefile.modpost | 20 ++++++++++++++++----
scripts/mod/modpost.c | 32 +++++++++++++++++++++-----------
2 files changed, 37 insertions(+), 15 deletions(-)
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 6db692a5d547..7d564a39f938 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -90,20 +90,25 @@ endif
# modpost options for modules (both in-kernel and external)
MODPOST += \
- $(addprefix -i ,$(input-symdump)) \
+ $(addprefix -i ,$(wildcard $(input-symdump))) \
$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N)
ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
MODPOST += -n
endif
+$(input-symdump):
+ @:
+
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
quiet_cmd_modpost = MODPOST $@
- cmd_modpost = sed 's/ko$$/o/' $(MODORDER) | $(MODPOST) -T -
+ cmd_modpost = sed 's/ko$$/o/' $< | $(MODPOST) -T -
-$(output-symdump): FORCE
- $(call cmd,modpost)
+$(output-symdump): $(MODORDER) $(input-symdump) FORCE
+ $(call if_changed,modpost)
+
+targets += $(output-symdump)
__modpost: $(output-symdump)
ifneq ($(KBUILD_MODPOST_NOFINAL),1)
@@ -113,6 +118,13 @@ endif
PHONY += FORCE
FORCE:
+existing-targets := $(wildcard $(sort $(targets)))
+
+-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
+
+PHONY += FORCE
+FORCE:
+
endif
.PHONY: $(PHONY)
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 4a2f27d97bf1..b839c48689df 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2375,6 +2375,25 @@ static void add_srcversion(struct buffer *b, struct module *mod)
}
}
+static void write_buf(struct buffer *b, const char *fname)
+{
+ FILE *file;
+
+ file = fopen(fname, "w");
+ if (!file) {
+ perror(fname);
+ exit(1);
+ }
+ if (fwrite(b->p, 1, b->pos, file) != b->pos) {
+ perror(fname);
+ exit(1);
+ }
+ if (fclose(file) != 0) {
+ perror(fname);
+ exit(1);
+ }
+}
+
static void write_if_changed(struct buffer *b, const char *fname)
{
char *tmp;
@@ -2407,16 +2426,7 @@ static void write_if_changed(struct buffer *b, const char *fname)
close_write:
fclose(file);
write:
- file = fopen(fname, "w");
- if (!file) {
- perror(fname);
- exit(1);
- }
- if (fwrite(b->p, 1, b->pos, file) != b->pos) {
- perror(fname);
- exit(1);
- }
- fclose(file);
+ write_buf(b, fname);
}
/* parse Module.symvers file. line format:
@@ -2508,7 +2518,7 @@ static void write_dump(const char *fname)
symbol = symbol->next;
}
}
- write_if_changed(&buf, fname);
+ write_buf(&buf, fname);
free(buf.p);
}
--
2.25.1
next prev parent reply other threads:[~2020-06-01 5:58 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-01 5:56 [PATCH 01/37] kbuild: refactor subdir-ym calculation Masahiro Yamada
2020-06-01 5:56 ` [PATCH 02/37] kbuild: refactor tagets caluculation for KBUILD_{BUILTIN,KBUILD_MODULES} Masahiro Yamada
2020-06-01 5:56 ` [PATCH 03/37] kbuild: merge init-y into core-y Masahiro Yamada
2020-06-01 5:56 ` [PATCH 04/37] kbuild: merge net-y and virt-y into drivers-y Masahiro Yamada
2020-06-01 5:56 ` [PATCH 05/37] kbuild: refactor KBUILD_VMLINUX_{OBJS,LIBS} calculation Masahiro Yamada
2020-06-03 4:21 ` Masahiro Yamada
2020-06-01 5:57 ` [PATCH 06/37] kbuild: update modules.order only when contained modules are updated Masahiro Yamada
2020-06-01 5:57 ` [PATCH 07/37] modpost: fix -i (--ignore-errors) MAKEFLAGS detection Masahiro Yamada
2020-06-01 5:57 ` [PATCH 08/37] modpost: move -T option close to the modpost command Masahiro Yamada
2020-06-01 5:57 ` [PATCH 09/37] modpost: pass -N option only for modules modpost Masahiro Yamada
2020-06-01 5:57 ` [PATCH 10/37] modpost: load KBUILD_EXTRA_SYMBOLS files in order Masahiro Yamada
2020-06-01 5:57 ` [PATCH 11/37] modpost: track if the symbol origin is a dump file or ELF object Masahiro Yamada
2020-06-01 5:57 ` [PATCH 12/37] modpost: allow to pass -i option multiple times to remove -e option Masahiro Yamada
2020-06-01 5:57 ` [PATCH 13/37] modpost: rename ext_sym_list to dump_list Masahiro Yamada
2020-06-01 5:57 ` [PATCH 14/37] modpost: re-add -e to set external_module flag Masahiro Yamada
2020-06-01 5:57 ` [PATCH 15/37] modpost: print symbol dump file as the build target in short log Masahiro Yamada
2020-06-01 5:57 ` [PATCH 16/37] modpost: refactor -i option calculation Masahiro Yamada
2020-06-01 5:57 ` [PATCH 17/37] modpost: generate vmlinux.symvers and reuse it for the second modpost Masahiro Yamada
2020-06-01 5:57 ` Masahiro Yamada [this message]
2020-06-01 5:57 ` [PATCH 19/37] modpost: show warning if vmlinux is not found when processing modules Masahiro Yamada
2020-06-01 5:57 ` [PATCH 20/37] modpost: show warning if any of symbol dump files is missing Masahiro Yamada
2020-06-01 5:57 ` [PATCH 21/37] modpost: drop RCS/CVS $Revision handling in MODULE_VERSION() Masahiro Yamada
2020-06-01 5:57 ` [PATCH 22/37] modpost: do not call get_modinfo() for vmlinux(.o) Masahiro Yamada
2020-06-01 5:57 ` [PATCH 23/37] modpost: add read_text_file() and get_line() helpers Masahiro Yamada
2020-06-01 5:57 ` [PATCH 24/37] modpost: fix potential mmap'ed file overrun in get_src_version() Masahiro Yamada
2020-06-01 5:57 ` [PATCH 25/37] modpost: avoid false-positive file open error Masahiro Yamada
2020-06-01 5:57 ` [PATCH 26/37] modpost: use read_text_file() and get_line() for reading text files Masahiro Yamada
2020-06-01 5:57 ` [PATCH 27/37] modpost: remove get_next_text() and make {grab,release_}file static Masahiro Yamada
2020-06-01 5:57 ` [PATCH 28/37] modpost: remove -s option Masahiro Yamada
2020-06-01 5:57 ` [PATCH 29/37] modpost: move -d option in scripts/Makefile.modpost Masahiro Yamada
2020-06-01 5:57 ` [PATCH 30/37] modpost: remove mod->is_dot_o struct member Masahiro Yamada
2020-06-01 5:57 ` [PATCH 31/37] modpost: remove is_vmlinux() call in check_for_{gpl_usage,unused}() Masahiro Yamada
2020-06-01 5:57 ` [PATCH 32/37] modpost: add mod->is_vmlinux struct member Masahiro Yamada
2020-06-01 5:57 ` [PATCH 33/37] modpost: remove mod->skip " Masahiro Yamada
2020-06-01 5:57 ` [PATCH 34/37] modpost: set have_vmlinux in new_module() Masahiro Yamada
2020-06-01 5:57 ` [PATCH 35/37] modpost: strip .o from modname before calling new_module() Masahiro Yamada
2020-06-01 5:57 ` [PATCH 36/37] modpost: remove is_vmlinux() helper Masahiro Yamada
2020-06-01 5:57 ` [PATCH 37/37] modpost: change elf_info->size to size_t Masahiro Yamada
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