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-rw-r--r--kernel/kexec.c30
1 files changed, 11 insertions, 19 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c
index b574920cbd4b..59f7b55ba745 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -786,7 +786,7 @@ static int kimage_load_normal_segment(struct kimage *image,
struct kexec_segment *segment)
{
unsigned long maddr;
- unsigned long ubytes, mbytes;
+ size_t ubytes, mbytes;
int result;
unsigned char __user *buf;
@@ -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);
@@ -850,7 +846,7 @@ static int kimage_load_crash_segment(struct kimage *image,
* We do things a page at a time for the sake of kmap.
*/
unsigned long maddr;
- unsigned long ubytes, mbytes;
+ size_t ubytes, mbytes;
int result;
unsigned char __user *buf;
@@ -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);
}
@@ -1540,14 +1533,13 @@ void vmcoreinfo_append_str(const char *fmt, ...)
{
va_list args;
char buf[0x50];
- int r;
+ size_t r;
va_start(args, 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);