From 4caf9615247aceab56e91df6c0e11892ea55f4f0 Mon Sep 17 00:00:00 2001 From: Minfei Huang Date: Tue, 2 Aug 2016 14:05:45 -0700 Subject: [PATCH] kexec: return error number directly This is a cleanup patch to make kexec more clear to return error number directly. The variable result is useless, because there is no other function's return value assignes to it. So remove it. Link: http://lkml.kernel.org/r/1464179273-57668-1-git-send-email-mnghuan@gmail.com Signed-off-by: Minfei Huang Cc: Dave Young Cc: Baoquan He Cc: Borislav Petkov Cc: Xunlei Pang Cc: Atsushi Kumagai Cc: Vivek Goyal Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/kexec_core.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index 56b3ed0927b0..23311c803b1b 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -147,7 +147,7 @@ static struct page *kimage_alloc_page(struct kimage *image, int sanity_check_segment_list(struct kimage *image) { - int result, i; + int i; unsigned long nr_segments = image->nr_segments; /* @@ -163,16 +163,15 @@ int sanity_check_segment_list(struct kimage *image) * simply because addresses are changed to page size * granularity. */ - result = -EADDRNOTAVAIL; for (i = 0; i < nr_segments; i++) { unsigned long mstart, mend; mstart = image->segment[i].mem; mend = mstart + image->segment[i].memsz; if ((mstart & ~PAGE_MASK) || (mend & ~PAGE_MASK)) - return result; + return -EADDRNOTAVAIL; if (mend >= KEXEC_DESTINATION_MEMORY_LIMIT) - return result; + return -EADDRNOTAVAIL; } /* Verify our destination addresses do not overlap. @@ -180,7 +179,6 @@ int sanity_check_segment_list(struct kimage *image) * through very weird things can happen with no * easy explanation as one segment stops on another. */ - result = -EINVAL; for (i = 0; i < nr_segments; i++) { unsigned long mstart, mend; unsigned long j; @@ -194,7 +192,7 @@ int sanity_check_segment_list(struct kimage *image) pend = pstart + image->segment[j].memsz; /* Do the segments overlap ? */ if ((mend > pstart) && (mstart < pend)) - return result; + return -EINVAL; } } @@ -203,10 +201,9 @@ int sanity_check_segment_list(struct kimage *image) * and it is easier to check up front than to be surprised * later on. */ - result = -EINVAL; for (i = 0; i < nr_segments; i++) { if (image->segment[i].bufsz > image->segment[i].memsz) - return result; + return -EINVAL; } /* @@ -220,7 +217,6 @@ int sanity_check_segment_list(struct kimage *image) */ if (image->type == KEXEC_TYPE_CRASH) { - result = -EADDRNOTAVAIL; for (i = 0; i < nr_segments; i++) { unsigned long mstart, mend; @@ -229,7 +225,7 @@ int sanity_check_segment_list(struct kimage *image) /* Ensure we are within the crash kernel limits */ if ((mstart < crashk_res.start) || (mend > crashk_res.end)) - return result; + return -EADDRNOTAVAIL; } }