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authorH. Peter Anvin <hpa@zytor.com>2012-02-28 23:36:21 -0800
committerH. Peter Anvin <hpa@zytor.com>2012-02-28 23:40:56 -0800
commita51f4047758d2bcd099ea113b833ed380f4024ba (patch)
tree43864a956b592934bc3ba1775c2d7d6aec539d97 /arch/x86/boot
parentb8d43cb504a94f1070159a37c8cb23008276eff3 (diff)
x86, build: Fix portability issues when cross-building
It would appear that we never actually generated a correct CRC when building on a bigendian machine. Depending on the word size, we would either generate an all-zero CRC (64-bit machine) or a byte-swapped CRC (32-bit machine.) Fix the types used so we don't arbitrarily use a 64-bit word to hold 32-bit numbers, and pass the CRC through put_unaligned_le32() like all the other numbers. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Matt Fleming <matt@console-pimps.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Nick Bowler <nbowler@elliptictech.com> Link: http://lkml.kernel.org/r/20120229111322.9eb4b23ff1672e8853ad3b3b@canb.auug.org.au
Diffstat (limited to 'arch/x86/boot')
-rw-r--r--arch/x86/boot/tools/build.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c
index f3bd2e676d2..ed549767a23 100644
--- a/arch/x86/boot/tools/build.c
+++ b/arch/x86/boot/tools/build.c
@@ -36,7 +36,7 @@
typedef unsigned char u8;
typedef unsigned short u16;
-typedef unsigned long u32;
+typedef unsigned int u32;
#define DEFAULT_MAJOR_ROOT 0
#define DEFAULT_MINOR_ROOT 0
@@ -247,8 +247,9 @@ int main(int argc, char ** argv)
}
/* Write the CRC */
- fprintf(stderr, "CRC %lx\n", crc);
- if (fwrite(&crc, 1, 4, stdout) != 4)
+ fprintf(stderr, "CRC %x\n", crc);
+ put_unaligned_le32(crc, buf);
+ if (fwrite(buf, 1, 4, stdout) != 4)
die("Writing CRC failed");
close(fd);