linux-kernel - [tip:perf/urgent] perf tools: Fix statfs.f_type data type mismatch build error with uclibc

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Date:	Sat, 17 Jan 2015 02:11:49 -0800
From:	tip-bot for Alexey Brodkin <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	Vineet.Gupta1@...opsys.com, tglx@...utronix.de, hpa@...or.com,
	linux-kernel@...r.kernel.org, namhyung@...nel.org, bp@...e.de,
	peterz@...radead.org, mingo@...nel.org, acme@...hat.com,
	abrodkin@...opsys.com, jolsa@...nel.org, dev@...yps.com
Subject: [tip:perf/urgent] perf tools:
  Fix statfs.f_type data type mismatch build error with uclibc

Commit-ID:  db1806edcfef007d9594435a331dcf7e7f1b8fac
Gitweb:     http://git.kernel.org/tip/db1806edcfef007d9594435a331dcf7e7f1b8fac
Author:     Alexey Brodkin <abrodkin@...opsys.com>
AuthorDate: Sat, 10 Jan 2015 16:40:50 +0530
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 16 Jan 2015 17:49:29 -0300

perf tools: Fix statfs.f_type data type mismatch build error with uclibc

ARC Linux uses the no legacy syscalls abi and corresponding uClibc headers
statfs defines f_type to be U32 which causes perf build breakage

http://git.uclibc.org/uClibc/tree/libc/sysdeps/linux/common-generic/bits/statfs.h

  ----------->8---------------
    CC       fs/fs.o
  fs/fs.c: In function 'fs__valid_mount':
  fs/fs.c:82:24: error: comparison between signed and unsigned integer
  expressions [-Werror=sign-compare]
    else if (st_fs.f_type != magic)
                          ^
  cc1: all warnings being treated as errors
  ----------->8---------------

Signed-off-by: Alexey Brodkin <abrodkin@...opsys.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Borislav Petkov <bp@...e.de>
Cc: Cody P Schafer <dev@...yps.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Vineet Gupta <Vineet.Gupta1@...opsys.com>
Link: http://lkml.kernel.org/r/1420888254-17504-2-git-send-email-vgupta@synopsys.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/lib/api/fs/debugfs.c | 2 +-
 tools/lib/api/fs/fs.c      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
index a74fba6..86ea2d7 100644
--- a/tools/lib/api/fs/debugfs.c
+++ b/tools/lib/api/fs/debugfs.c
@@ -67,7 +67,7 @@ int debugfs_valid_mountpoint(const char *debugfs)
 
 	if (statfs(debugfs, &st_fs) < 0)
 		return -ENOENT;
-	else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
+	else if ((long)st_fs.f_type != (long)DEBUGFS_MAGIC)
 		return -ENOENT;
 
 	return 0;
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index 65d9be3..128ef63 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -79,7 +79,7 @@ static int fs__valid_mount(const char *fs, long magic)
 
 	if (statfs(fs, &st_fs) < 0)
 		return -ENOENT;
-	else if (st_fs.f_type != magic)
+	else if ((long)st_fs.f_type != magic)
 		return -ENOENT;
 
 	return 0;
--
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