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b6db0a5621
With compilers which follow the C99 standard (like modern versions of gcc and
clang), "extern inline" does the opposite thing from older versions of gcc
(emits code for an externally linkable version of the inline function).
"static inline" does the intended behavior in all cases instead.
Description taken from:
"staging, rtl8192e, LLVMLinux: Change extern inline to static inline"
(sha1: 6d91857d48)
The patch removes compilation warnings W=1:
./arch/microblaze/include/asm/delay.h:18:20: warning: no previous
prototype for '__delay' [-Wmissing-prototypes]
extern inline void __delay(unsigned long loops)
./arch/microblaze/include/asm/delay.h:46:20: warning: no previous
prototype for '__udelay' [-Wmissing-prototypes]
extern inline void __udelay(unsigned int x)
./arch/microblaze/include/asm/pgalloc.h:63:22: warning: no previous
prototype for 'get_pgd_slow' [-Wmissing-prototypes]
extern inline pgd_t *get_pgd_slow(void)
./arch/microblaze/include/asm/pgalloc.h:73:22: warning: no previous
prototype for 'get_pgd_fast' [-Wmissing-prototypes]
extern inline pgd_t *get_pgd_fast(void)
./arch/microblaze/include/asm/pgalloc.h:87:20: warning: no previous
prototype for 'free_pgd_fast' [-Wmissing-prototypes]
extern inline void free_pgd_fast(pgd_t *pgd)
./arch/microblaze/include/asm/pgalloc.h:94:20: warning: no previous
prototype for 'free_pgd_slow' [-Wmissing-prototypes]
extern inline void free_pgd_slow(pgd_t *pgd)
./arch/microblaze/include/asm/pgalloc.h:149:20: warning: no previous
prototype for 'pte_free_fast' [-Wmissing-prototypes]
extern inline void pte_free_fast(pte_t *pte)
./arch/microblaze/include/asm/pgalloc.h:156:20: warning: no previous
prototype for 'pte_free_kernel' [-Wmissing-prototypes]
extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
./arch/microblaze/include/asm/pgalloc.h:161:20: warning: no previous
prototype for 'pte_free_slow' [-Wmissing-prototypes]
extern inline void pte_free_slow(struct page *ptepage)
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
/*
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* include/asm-microblaze/delay.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2008 Michal Simek
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* Copyright (C) 2007 John Williams
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* Copyright (C) 2006 Atmark Techno, Inc.
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*/
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#ifndef _ASM_MICROBLAZE_DELAY_H
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#define _ASM_MICROBLAZE_DELAY_H
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#include <linux/param.h>
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static inline void __delay(unsigned long loops)
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{
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asm volatile ("# __delay \n\t" \
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"1: addi %0, %0, -1\t\n" \
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"bneid %0, 1b \t\n" \
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"nop \t\n"
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: "=r" (loops)
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: "0" (loops));
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}
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/*
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* Note that 19 * 226 == 4294 ==~ 2^32 / 10^6, so
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* loops = (4294 * usecs * loops_per_jiffy * HZ) / 2^32.
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*
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* The mul instruction gives us loops = (a * b) / 2^32.
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* We choose a = usecs * 19 * HZ and b = loops_per_jiffy * 226
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* because this lets us support a wide range of HZ and
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* loops_per_jiffy values without either a or b overflowing 2^32.
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* Thus we need usecs * HZ <= (2^32 - 1) / 19 = 226050910 and
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* loops_per_jiffy <= (2^32 - 1) / 226 = 19004280
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* (which corresponds to ~3800 bogomips at HZ = 100).
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* -- paulus
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*/
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#define __MAX_UDELAY (226050910UL/HZ) /* maximum udelay argument */
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#define __MAX_NDELAY (4294967295UL/HZ) /* maximum ndelay argument */
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extern unsigned long loops_per_jiffy;
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static inline void __udelay(unsigned int x)
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{
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unsigned long long tmp =
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(unsigned long long)x * (unsigned long long)loops_per_jiffy \
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* 226LL;
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unsigned loops = tmp >> 32;
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/*
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__asm__("mulxuu %0,%1,%2" : "=r" (loops) :
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"r" (x), "r" (loops_per_jiffy * 226));
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*/
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__delay(loops);
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}
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extern void __bad_udelay(void); /* deliberately undefined */
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extern void __bad_ndelay(void); /* deliberately undefined */
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#define udelay(n) \
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({ \
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if (__builtin_constant_p(n)) { \
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if ((n) / __MAX_UDELAY >= 1) \
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__bad_udelay(); \
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else \
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__udelay((n) * (19 * HZ)); \
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} else { \
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__udelay((n) * (19 * HZ)); \
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} \
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})
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#define ndelay(n) \
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({ \
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if (__builtin_constant_p(n)) { \
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if ((n) / __MAX_NDELAY >= 1) \
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__bad_ndelay(); \
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else \
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__udelay((n) * HZ); \
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} else { \
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__udelay((n) * HZ); \
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} \
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})
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#define muldiv(a, b, c) (((a)*(b))/(c))
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#endif /* _ASM_MICROBLAZE_DELAY_H */
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