From d7627467b7a8dd6944885290a03a07ceb28c10eb Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 17 Aug 2010 23:52:56 +0100 Subject: Make do_execve() take a const filename pointer Make do_execve() take a const filename pointer so that kernel_execve() compiles correctly on ARM: arch/arm/kernel/sys_arm.c:88: warning: passing argument 1 of 'do_execve' discards qualifiers from pointer target type This also requires the argv and envp arguments to be consted twice, once for the pointer array and once for the strings the array points to. This is because do_execve() passes a pointer to the filename (now const) to copy_strings_kernel(). A simpler alternative would be to cast the filename pointer in do_execve() when it's passed to copy_strings_kernel(). do_execve() may not change any of the strings it is passed as part of the argv or envp lists as they are some of them in .rodata, so marking these strings as const should be fine. Further kernel_execve() and sys_execve() need to be changed to match. This has been test built on x86_64, frv, arm and mips. Signed-off-by: David Howells Tested-by: Ralf Baechle Acked-by: Russell King Signed-off-by: Linus Torvalds --- arch/h8300/kernel/process.c | 5 ++++- arch/h8300/kernel/sys_h8300.c | 4 +++- 2 files changed, 7 insertions(+), 2 deletions(-) (limited to 'arch/h8300') diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c index 8b7b78d77d5c..97478138e361 100644 --- a/arch/h8300/kernel/process.c +++ b/arch/h8300/kernel/process.c @@ -212,7 +212,10 @@ int copy_thread(unsigned long clone_flags, /* * sys_execve() executes a new program. */ -asmlinkage int sys_execve(const char *name, char **argv, char **envp,int dummy,...) +asmlinkage int sys_execve(const char *name, + const char *const *argv, + const char *const *envp, + int dummy, ...) { int error; char * filename; diff --git a/arch/h8300/kernel/sys_h8300.c b/arch/h8300/kernel/sys_h8300.c index f9b3f44da69f..dc1ac0243b78 100644 --- a/arch/h8300/kernel/sys_h8300.c +++ b/arch/h8300/kernel/sys_h8300.c @@ -51,7 +51,9 @@ asmlinkage void syscall_print(void *dummy,...) * Do a system call from kernel instead of calling sys_execve so we * end up with proper pt_regs. */ -int kernel_execve(const char *filename, char *const argv[], char *const envp[]) +int kernel_execve(const char *filename, + const char *const argv[], + const char *const envp[]) { register long res __asm__("er0"); register char *const *_c __asm__("er3") = envp; -- cgit v1.2.3 From 3ab61eb9fd751336d1b3ad50ec7704bd3b62213f Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 31 Aug 2010 16:52:11 +0100 Subject: h8300: IRQ flags should be stored in an unsigned long Fix h8300's asm/atomic.h to store the IRQ flags in an unsigned long to deal with warnings of the following type: arch/h8300/include/asm/atomic.h: In function 'atomic_add_return': arch/h8300/include/asm/atomic.h:22: warning: comparison of distinct pointer types lacks a cast arch/h8300/include/asm/atomic.h:24: warning: comparison of distinct pointer types lacks a cast Signed-off-by: David Howells Signed-off-by: Linus Torvalds --- arch/h8300/include/asm/atomic.h | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) (limited to 'arch/h8300') diff --git a/arch/h8300/include/asm/atomic.h b/arch/h8300/include/asm/atomic.h index e936804b7508..984221abb66d 100644 --- a/arch/h8300/include/asm/atomic.h +++ b/arch/h8300/include/asm/atomic.h @@ -18,7 +18,8 @@ static __inline__ int atomic_add_return(int i, atomic_t *v) { - int ret,flags; + unsigned long flags; + int ret; local_irq_save(flags); ret = v->counter += i; local_irq_restore(flags); @@ -30,7 +31,8 @@ static __inline__ int atomic_add_return(int i, atomic_t *v) static __inline__ int atomic_sub_return(int i, atomic_t *v) { - int ret,flags; + unsigned long flags; + int ret; local_irq_save(flags); ret = v->counter -= i; local_irq_restore(flags); @@ -42,7 +44,8 @@ static __inline__ int atomic_sub_return(int i, atomic_t *v) static __inline__ int atomic_inc_return(atomic_t *v) { - int ret,flags; + unsigned long flags; + int ret; local_irq_save(flags); v->counter++; ret = v->counter; @@ -64,7 +67,8 @@ static __inline__ int atomic_inc_return(atomic_t *v) static __inline__ int atomic_dec_return(atomic_t *v) { - int ret,flags; + unsigned long flags; + int ret; local_irq_save(flags); --v->counter; ret = v->counter; @@ -76,7 +80,8 @@ static __inline__ int atomic_dec_return(atomic_t *v) static __inline__ int atomic_dec_and_test(atomic_t *v) { - int ret,flags; + unsigned long flags; + int ret; local_irq_save(flags); --v->counter; ret = v->counter; -- cgit v1.2.3 From b857189d94e0d8a05943349618c4f84dbc57144c Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 31 Aug 2010 16:52:16 +0100 Subject: h8300: Fix die() Fix h8300's die() to take care of a number of problems: CC arch/h8300/kernel/traps.o In file included from arch/h8300/include/asm/bitops.h:10, from include/linux/bitops.h:22, from include/linux/kernel.h:17, from include/linux/sched.h:54, from arch/h8300/kernel/traps.c:18: arch/h8300/include/asm/system.h:136: warning: 'struct pt_regs' declared inside parameter list arch/h8300/include/asm/system.h:136: warning: its scope is only this definition or declaration, which is probably not what you want arch/h8300/kernel/traps.c:100: error: conflicting types for 'die' arch/h8300/include/asm/system.h:136: error: previous declaration of 'die' was here make[2]: *** [arch/h8300/kernel/traps.o] Error 1 Signed-off-by: David Howells Signed-off-by: Linus Torvalds --- arch/h8300/include/asm/system.h | 4 +++- arch/h8300/kernel/traps.c | 2 +- 2 files changed, 4 insertions(+), 2 deletions(-) (limited to 'arch/h8300') diff --git a/arch/h8300/include/asm/system.h b/arch/h8300/include/asm/system.h index d98d97685f06..16bf1560ff68 100644 --- a/arch/h8300/include/asm/system.h +++ b/arch/h8300/include/asm/system.h @@ -3,6 +3,8 @@ #include +struct pt_regs; + /* * switch_to(n) should switch tasks to task ptr, first checking that * ptr isn't the current task, in which case it does nothing. This @@ -155,6 +157,6 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz #define arch_align_stack(x) (x) -void die(char *str, struct pt_regs *fp, unsigned long err); +extern void die(const char *str, struct pt_regs *fp, unsigned long err); #endif /* _H8300_SYSTEM_H */ diff --git a/arch/h8300/kernel/traps.c b/arch/h8300/kernel/traps.c index 3c0b66bc669e..dfa05bd908b6 100644 --- a/arch/h8300/kernel/traps.c +++ b/arch/h8300/kernel/traps.c @@ -96,7 +96,7 @@ static void dump(struct pt_regs *fp) printk("\n\n"); } -void die(char *str, struct pt_regs *fp, unsigned long err) +void die(const char *str, struct pt_regs *fp, unsigned long err) { static int diecount; -- cgit v1.2.3 From 1e72910e248fb94839cd63c0c62107b1f15716f9 Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 31 Aug 2010 16:52:21 +0100 Subject: h8300: Fix missing consts in kernel_execve() Fix missing consts in h8300's kernel_execve(): arch/h8300/kernel/sys_h8300.c: In function 'kernel_execve': arch/h8300/kernel/sys_h8300.c:59: warning: initialization from incompatible pointer type arch/h8300/kernel/sys_h8300.c:60: warning: initialization from incompatible pointer type Signed-off-by: David Howells Signed-off-by: Linus Torvalds --- arch/h8300/kernel/sys_h8300.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/h8300') diff --git a/arch/h8300/kernel/sys_h8300.c b/arch/h8300/kernel/sys_h8300.c index dc1ac0243b78..aaf5e5a48f93 100644 --- a/arch/h8300/kernel/sys_h8300.c +++ b/arch/h8300/kernel/sys_h8300.c @@ -56,8 +56,8 @@ int kernel_execve(const char *filename, const char *const envp[]) { register long res __asm__("er0"); - register char *const *_c __asm__("er3") = envp; - register char *const *_b __asm__("er2") = argv; + register const char *const *_c __asm__("er3") = envp; + register const char *const *_b __asm__("er2") = argv; register const char * _a __asm__("er1") = filename; __asm__ __volatile__ ("mov.l %1,er0\n\t" "trapa #0\n\t" -- cgit v1.2.3