linux-kernel - [RFC][PATCH 03/13] recordmcount: Remove unused fd from uwrite() and ulseek()

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Message-ID: <d6544ccbe5e469278582aa454041c8ee3cabf532.1558569448.git.mhelsley@vmware.com>
Date:   Wed, 22 May 2019 17:03:26 -0700
From:   Matt Helsley <mhelsley@...are.com>
To:     LKML <linux-kernel@...r.kernel.org>
CC:     Ingo Molnar <mingo@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Matt Helsley <mhelsley@...are.com>
Subject: [RFC][PATCH 03/13] recordmcount: Remove unused fd from uwrite() and ulseek()

uwrite() works within the pseudo-mapping and extends it as necessary
without needing the file descriptor (fd) parameter passed to it.
Similarly, ulseek() doesn't need its fd parameter. These parameters
were only added because the functions bear a conceptual resemblance
to write() and lseek(). Worse, they obscure the fact that at the time
uwrite() and ulseek() are called fd_map is not a valid file descriptor.

Remove the unused file descriptor parameters that make it look like
fd_map is still valid.

Signed-off-by: Matt Helsley <mhelsley@...are.com>
---
 scripts/recordmcount.c | 16 ++++++++--------
 scripts/recordmcount.h | 26 +++++++++++++-------------
 2 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index 30ef6da68e12..9101b67921cb 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -92,7 +92,7 @@ succeed_file(void)
 /* ulseek, uwrite, ...:  Check return value for errors. */
 
 static off_t
-ulseek(int const fd, off_t const offset, int const whence)
+ulseek(off_t const offset, int const whence)
 {
 	switch (whence) {
 	case SEEK_SET:
@@ -113,7 +113,7 @@ ulseek(int const fd, off_t const offset, int const whence)
 }
 
 static size_t
-uwrite(int const fd, void const *const buf, size_t const count)
+uwrite(void const *const buf, size_t const count)
 {
 	size_t cnt = count;
 	off_t idx = 0;
@@ -183,8 +183,8 @@ static int make_nop_x86(void *map, size_t const offset)
 		return -1;
 
 	/* convert to nop */
-	ulseek(fd_map, offset - 1, SEEK_SET);
-	uwrite(fd_map, ideal_nop, 5);
+	ulseek(offset - 1, SEEK_SET);
+	uwrite(ideal_nop, 5);
 	return 0;
 }
 
@@ -232,10 +232,10 @@ static int make_nop_arm(void *map, size_t const offset)
 		return -1;
 
 	/* Convert to nop */
-	ulseek(fd_map, off, SEEK_SET);
+	ulseek(off, SEEK_SET);
 
 	do {
-		uwrite(fd_map, ideal_nop, nop_size);
+		uwrite(ideal_nop, nop_size);
 	} while (--cnt > 0);
 
 	return 0;
@@ -252,8 +252,8 @@ static int make_nop_arm64(void *map, size_t const offset)
 		return -1;
 
 	/* Convert to nop */
-	ulseek(fd_map, offset, SEEK_SET);
-	uwrite(fd_map, ideal_nop, 4);
+	ulseek(offset, SEEK_SET);
+	uwrite(ideal_nop, 4);
 	return 0;
 }
 
diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index 2e7793735e14..d9736f41009e 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -203,14 +203,14 @@ static void append_func(Elf_Ehdr *const ehdr,
 	new_e_shoff = t;
 
 	/* body for new shstrtab */
-	ulseek(fd_map, sb.st_size, SEEK_SET);
-	uwrite(fd_map, old_shstr_sh_offset + (void *)ehdr, old_shstr_sh_size);
-	uwrite(fd_map, mc_name, 1 + strlen(mc_name));
+	ulseek(sb.st_size, SEEK_SET);
+	uwrite(old_shstr_sh_offset + (void *)ehdr, old_shstr_sh_size);
+	uwrite(mc_name, 1 + strlen(mc_name));
 
 	/* old(modified) Elf_Shdr table, word-byte aligned */
-	ulseek(fd_map, t, SEEK_SET);
+	ulseek(t, SEEK_SET);
 	t += sizeof(Elf_Shdr) * old_shnum;
-	uwrite(fd_map, old_shoff + (void *)ehdr,
+	uwrite(old_shoff + (void *)ehdr,
 	       sizeof(Elf_Shdr) * old_shnum);
 
 	/* new sections __mcount_loc and .rel__mcount_loc */
@@ -226,7 +226,7 @@ static void append_func(Elf_Ehdr *const ehdr,
 	mcsec.sh_info = 0;
 	mcsec.sh_addralign = _w(_size);
 	mcsec.sh_entsize = _w(_size);
-	uwrite(fd_map, &mcsec, sizeof(mcsec));
+	uwrite(&mcsec, sizeof(mcsec));
 
 	mcsec.sh_name = w(old_shstr_sh_size);
 	mcsec.sh_type = (sizeof(Elf_Rela) == rel_entsize)
@@ -240,15 +240,15 @@ static void append_func(Elf_Ehdr *const ehdr,
 	mcsec.sh_info = w(old_shnum);
 	mcsec.sh_addralign = _w(_size);
 	mcsec.sh_entsize = _w(rel_entsize);
-	uwrite(fd_map, &mcsec, sizeof(mcsec));
+	uwrite(&mcsec, sizeof(mcsec));
 
-	uwrite(fd_map, mloc0, (void *)mlocp - (void *)mloc0);
-	uwrite(fd_map, mrel0, (void *)mrelp - (void *)mrel0);
+	uwrite(mloc0, (void *)mlocp - (void *)mloc0);
+	uwrite(mrel0, (void *)mrelp - (void *)mrel0);
 
 	ehdr->e_shoff = _w(new_e_shoff);
 	ehdr->e_shnum = w2(2 + w2(ehdr->e_shnum));  /* {.rel,}__mcount_loc */
-	ulseek(fd_map, 0, SEEK_SET);
-	uwrite(fd_map, ehdr, sizeof(*ehdr));
+	ulseek(0, SEEK_SET);
+	uwrite(ehdr, sizeof(*ehdr));
 }
 
 static unsigned get_mcountsym(Elf_Sym const *const sym0,
@@ -396,8 +396,8 @@ static void nop_mcount(Elf_Shdr const *const relhdr,
 			Elf_Rel rel;
 			rel = *(Elf_Rel *)relp;
 			Elf_r_info(&rel, Elf_r_sym(relp), rel_type_nop);
-			ulseek(fd_map, (void *)relp - (void *)ehdr, SEEK_SET);
-			uwrite(fd_map, &rel, sizeof(rel));
+			ulseek((void *)relp - (void *)ehdr, SEEK_SET);
+			uwrite(&rel, sizeof(rel));
 		}
 		relp = (Elf_Rel const *)(rel_entsize + (void *)relp);
 	}
-- 
2.20.1