linux-kernel - [PATCH v3 17/27] S390: use helpers for rlimits

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Date:	Sat, 28 Nov 2009 00:05:57 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	jirislaby@...il.com
Cc:	mingo@...e.hu, nhorman@...driver.com, sfr@...b.auug.org.au,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	marcin.slusarz@...il.com, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, torvalds@...ux-foundation.org, oleg@...hat.com,
	James Morris <jmorris@...ei.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org
Subject: [PATCH v3 17/27] S390: use helpers for rlimits

Make sure compiler won't do weird things with limits. E.g. fetching
them twice may return 2 different values after writable limits are
implemented.

I.e. either use newly added rlimit helpers or ACCESS_ONCE if not
applicable.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: James Morris <jmorris@...ei.org>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux390@...ibm.com
Cc: linux-s390@...r.kernel.org
---
 arch/s390/mm/mmap.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index f4558cc..0acf3aa 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -40,7 +40,7 @@
 
 static inline unsigned long mmap_base(void)
 {
-	unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
+	unsigned long gap = rlim_get_cur(RLIMIT_STACK);
 
 	if (gap < MIN_GAP)
 		gap = MIN_GAP;
@@ -61,7 +61,7 @@ static inline int mmap_is_legacy(void)
 #endif
 	return sysctl_legacy_va_layout ||
 	    (current->personality & ADDR_COMPAT_LAYOUT) ||
-	    current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY;
+	    rlim_get_cur(RLIMIT_STACK) == RLIM_INFINITY;
 }
 
 #ifndef CONFIG_64BIT
-- 
1.6.5.3

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