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authorZhang Yanfei <zhangyanfei@cn.fujitsu.com>2013-04-30 15:28:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 17:04:07 -0700
commit31c3a3fe0777642816045a8dd1b666f1718851d7 (patch)
tree09995a2cfce420c77b2403acf1a73d25c99a7a78 /kernel
parent310faaa9b2d075b8fd477550c3d85ccddec76f35 (diff)
downloadlinux-31c3a3fe0777642816045a8dd1b666f1718851d7.tar.bz2
kexec: Use min() and min_t() to simplify logic
Simplify the logic of variable assignments. [akpm@linux-foundation.org: replace min_t with min, remove unneeded casts] Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Reviewed-by: Simon Horman <horms@verge.net.au> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/kexec.c24
1 files changed, 8 insertions, 16 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c
index b2c1306c863d..59f7b55ba745 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -819,13 +819,9 @@ static int kimage_load_normal_segment(struct kimage *image,
/* Start with a clear page */
clear_page(ptr);
ptr += maddr & ~PAGE_MASK;
- mchunk = PAGE_SIZE - (maddr & ~PAGE_MASK);
- if (mchunk > mbytes)
- mchunk = mbytes;
-
- uchunk = mchunk;
- if (uchunk > ubytes)
- uchunk = ubytes;
+ mchunk = min_t(size_t, mbytes,
+ PAGE_SIZE - (maddr & ~PAGE_MASK));
+ uchunk = min(ubytes, mchunk);
result = copy_from_user(ptr, buf, uchunk);
kunmap(page);
@@ -871,13 +867,10 @@ static int kimage_load_crash_segment(struct kimage *image,
}
ptr = kmap(page);
ptr += maddr & ~PAGE_MASK;
- mchunk = PAGE_SIZE - (maddr & ~PAGE_MASK);
- if (mchunk > mbytes)
- mchunk = mbytes;
-
- uchunk = mchunk;
- if (uchunk > ubytes) {
- uchunk = ubytes;
+ mchunk = min_t(size_t, mbytes,
+ PAGE_SIZE - (maddr & ~PAGE_MASK));
+ uchunk = min(ubytes, mchunk);
+ if (mchunk > uchunk) {
/* Zero the trailing part of the page */
memset(ptr + uchunk, 0, mchunk - uchunk);
}
@@ -1546,8 +1539,7 @@ void vmcoreinfo_append_str(const char *fmt, ...)
r = vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
- if (r + vmcoreinfo_size > vmcoreinfo_max_size)
- r = vmcoreinfo_max_size - vmcoreinfo_size;
+ r = min(r, vmcoreinfo_max_size - vmcoreinfo_size);
memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);