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debugfs: Have debugfs_print_regs32() return void 

The seq_printf() will soon just return void, and seq_has_overflowed()
should be used instead to see if the seq can no longer accept input.

As the return value of debugfs_print_regs32() has no users and
the seq_file descriptor should be checked with seq_has_overflowed()
instead of return values of functions, it is better to just have
debugfs_print_regs32() also return void.

Link: http://lkml.kernel.org/p/2634b19eb1c04a9d31148c1fe6f1f3819be95349.1412031505.git.joe@perches.com

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Joe Perches <joe@perches.com>
[ original change only updated seq_printf() return, added return of
  void to debugfs_print_regs32() as well ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Joe Perches 2014-09-29 16:08:26 -07:00 committed by Steven Rostedt
parent a3816ab0e8
commit 9761536e1d
3 changed files with 12 additions and 12 deletions
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2
Documentation/filesystems/debugfs.txt
View File

@ -140,7 +140,7 @@ file.
struct dentry *parent,
struct debugfs_regset32 *regset);
int debugfs_print_regs32(struct seq_file *s, struct debugfs_reg32 *regs,
void debugfs_print_regs32(struct seq_file *s, struct debugfs_reg32 *regs,
int nregs, void __iomem *base, char *prefix);
The "base" argument may be 0, but you may want to build the reg32 array

15
fs/debugfs/file.c
View File

@ -692,18 +692,19 @@ EXPORT_SYMBOL_GPL(debugfs_create_u32_array);
* because some peripherals have several blocks of identical registers,
* for example configuration of dma channels
*/
int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
int nregs, void __iomem *base, char *prefix)
void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
int nregs, void __iomem *base, char *prefix)
{
int i, ret = 0;
int i;
for (i = 0; i < nregs; i++, regs++) {
if (prefix)
ret += seq_printf(s, "%s", prefix);
ret += seq_printf(s, "%s = 0x%08x\n", regs->name,
readl(base + regs->offset));
seq_printf(s, "%s", prefix);
seq_printf(s, "%s = 0x%08x\n", regs->name,
readl(base + regs->offset));
if (seq_has_overflowed(s))
break;
}
return ret;
}
EXPORT_SYMBOL_GPL(debugfs_print_regs32);

7
include/linux/debugfs.h
View File

@ -92,8 +92,8 @@ struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
struct dentry *parent,
struct debugfs_regset32 *regset);
int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
int nregs, void __iomem *base, char *prefix);
void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
int nregs, void __iomem *base, char *prefix);
struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
struct dentry *parent,
@ -233,10 +233,9 @@ static inline struct dentry *debugfs_create_regset32(const char *name,
return ERR_PTR(-ENODEV);
}
static inline int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
static inline void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
int nregs, void __iomem *base, char *prefix)
{
return 0;
}
static inline bool debugfs_initialized(void)