linux-kernel - [PATCH 1/3] binfmt_elf: Clean up the variable name of map flags

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Date:   Fri,  6 Oct 2017 11:37:56 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
        oleg@...hat.com, mhocko@...ne.org, keescook@...omium.org,
        jkosina@...e.cz, mingo@...e.hu, torvalds@...ux-foundation.org,
        Baoquan He <bhe@...hat.com>
Subject: [PATCH 1/3] binfmt_elf: Clean up the variable name of map flags

In load_elf_interp() and elf_map(), variables with value of map flags
are named as type or elf_type. That may bring confusion since their
values not only contain map type which is MAP_SHARED or MAP_PRIVATE,
also MAP_FIXED or MAP_DENYWRITE, etc.

So change them as flags or elf_flags.

Signed-off-by: Baoquan He <bhe@...hat.com>
---
 fs/binfmt_elf.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 73b01e474fdc..72b7ecba7ead 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -342,7 +342,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
 #ifndef elf_map
 
 static unsigned long elf_map(struct file *filep, unsigned long addr,
-		struct elf_phdr *eppnt, int prot, int type,
+		struct elf_phdr *eppnt, int prot, int flags,
 		unsigned long total_size)
 {
 	unsigned long map_addr;
@@ -366,11 +366,11 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,
 	*/
 	if (total_size) {
 		total_size = ELF_PAGEALIGN(total_size);
-		map_addr = vm_mmap(filep, addr, total_size, prot, type, off);
+		map_addr = vm_mmap(filep, addr, total_size, prot, flags, off);
 		if (!BAD_ADDR(map_addr))
 			vm_munmap(map_addr+size, total_size-size);
 	} else
-		map_addr = vm_mmap(filep, addr, size, prot, type, off);
+		map_addr = vm_mmap(filep, addr, size, prot, flags, off);
 
 	return(map_addr);
 }
@@ -556,7 +556,7 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
 	eppnt = interp_elf_phdata;
 	for (i = 0; i < interp_elf_ex->e_phnum; i++, eppnt++) {
 		if (eppnt->p_type == PT_LOAD) {
-			int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
+			int elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
 			int elf_prot = 0;
 			unsigned long vaddr = 0;
 			unsigned long k, map_addr;
@@ -569,12 +569,12 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
 				elf_prot |= PROT_EXEC;
 			vaddr = eppnt->p_vaddr;
 			if (interp_elf_ex->e_type == ET_EXEC || load_addr_set)
-				elf_type |= MAP_FIXED;
+				elf_flags |= MAP_FIXED;
 			else if (no_base && interp_elf_ex->e_type == ET_DYN)
 				load_addr = -vaddr;
 
 			map_addr = elf_map(interpreter, load_addr + vaddr,
-					eppnt, elf_prot, elf_type, total_size);
+					eppnt, elf_prot, elf_flags, total_size);
 			total_size = 0;
 			if (!*interp_map_addr)
 				*interp_map_addr = map_addr;
-- 
2.5.5