From bba3d8c3b3c0f2123be5bc687d1cddc13437c923 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Mon, 23 Jul 2012 12:16:19 +0100 Subject: [PATCH 1/2] [PARISC] Redefine ATOMIC_INIT and ATOMIC64_INIT to drop the casts The following build error occured during a parisc build with swap-over-NFS patches applied. net/core/sock.c:274:36: error: initializer element is not constant net/core/sock.c:274:36: error: (near initialization for 'memalloc_socks') net/core/sock.c:274:36: error: initializer element is not constant Dave Anglin says: > Here is the line in sock.i: > > struct static_key memalloc_socks = ((struct static_key) { .enabled = > ((atomic_t) { (0) }) }); The above line contains two compound literals. It also uses a designated initializer to initialize the field enabled. A compound literal is not a constant expression. The location of the above statement isn't fully clear, but if a compound literal occurs outside the body of a function, the initializer list must consist of constant expressions. Reported-by: Fengguang Wu Signed-off-by: Mel Gorman Cc: Signed-off-by: James Bottomley --- arch/parisc/include/asm/atomic.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/parisc/include/asm/atomic.h b/arch/parisc/include/asm/atomic.h index 6c6defc24619..af9cf30ed474 100644 --- a/arch/parisc/include/asm/atomic.h +++ b/arch/parisc/include/asm/atomic.h @@ -141,7 +141,7 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u) #define atomic_sub_and_test(i,v) (atomic_sub_return((i),(v)) == 0) -#define ATOMIC_INIT(i) ((atomic_t) { (i) }) +#define ATOMIC_INIT(i) { (i) } #define smp_mb__before_atomic_dec() smp_mb() #define smp_mb__after_atomic_dec() smp_mb() @@ -150,7 +150,7 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u) #ifdef CONFIG_64BIT -#define ATOMIC64_INIT(i) ((atomic64_t) { (i) }) +#define ATOMIC64_INIT(i) { (i) } static __inline__ s64 __atomic64_add_return(s64 i, atomic64_t *v) From 5b24c421621792fcc588af6f644d6acf2dd798cc Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Thu, 2 Aug 2012 15:33:59 +0200 Subject: [PATCH 2/2] [PARISC] fix personality flag check in copy_thread() Directly comparing task_struct->personality against PER_* is not fully correct, as it doesn't take flags potentially stored in top three bytes into account. Analogically, directly forcefully setting personality to PER_LINUX32 or PER_LINUX discards any flags stored in the top three bytes. Signed-off-by: Jiri Kosina Signed-off-by: James Bottomley --- arch/parisc/kernel/process.c | 2 +- arch/parisc/kernel/sys_parisc.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c index d4b94b395c16..2c05a9292a81 100644 --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -309,7 +309,7 @@ copy_thread(unsigned long clone_flags, unsigned long usp, cregs->ksp = (unsigned long)stack + (pregs->gr[21] & (THREAD_SIZE - 1)); cregs->gr[30] = usp; - if (p->personality == PER_HPUX) { + if (personality(p->personality) == PER_HPUX) { #ifdef CONFIG_HPUX cregs->kpc = (unsigned long) &hpux_child_return; #else diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c index c9b932260f47..7426e40699bd 100644 --- a/arch/parisc/kernel/sys_parisc.c +++ b/arch/parisc/kernel/sys_parisc.c @@ -225,12 +225,12 @@ long parisc_personality(unsigned long personality) long err; if (personality(current->personality) == PER_LINUX32 - && personality == PER_LINUX) - personality = PER_LINUX32; + && personality(personality) == PER_LINUX) + personality = (personality & ~PER_MASK) | PER_LINUX32; err = sys_personality(personality); - if (err == PER_LINUX32) - err = PER_LINUX; + if (personality(err) == PER_LINUX32) + err = (err & ~PER_MASK) | PER_LINUX; return err; }