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41ae864b69
In P2ALIGN, the result would be incorrect when align is unsigned integer and x is larger than max value of the type of align. In that case, -(align) would be a positive integer, which means high bits would be zero and finally stay zero after '&' when align is converted to a larger integer type. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Youzhong Yang <yyang@mathworks.com> Signed-off-by: Qiuhao Chen <chenqiuhao1997@gmail.com> Closes #15940
217 lines
6.0 KiB
C
217 lines
6.0 KiB
C
/*
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SPL_SYSMACROS_H
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#define _SPL_SYSMACROS_H
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/sched/rt.h>
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#include <linux/cpumask.h>
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#include <sys/debug.h>
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#include <sys/zone.h>
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#include <sys/signal.h>
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#include <asm/page.h>
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#ifndef _KERNEL
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#define _KERNEL __KERNEL__
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#endif
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#define FALSE 0
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#define TRUE 1
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#define INT8_MAX (127)
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#define INT8_MIN (-128)
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#define UINT8_MAX (255)
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#define UINT8_MIN (0)
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#define INT16_MAX (32767)
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#define INT16_MIN (-32768)
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#define UINT16_MAX (65535)
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#define UINT16_MIN (0)
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#define INT32_MAX INT_MAX
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#define INT32_MIN INT_MIN
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#define UINT32_MAX UINT_MAX
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#define UINT32_MIN UINT_MIN
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#define INT64_MAX LLONG_MAX
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#define INT64_MIN LLONG_MIN
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#define UINT64_MAX ULLONG_MAX
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#define UINT64_MIN ULLONG_MIN
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#define NBBY 8
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#define MAXMSGLEN 256
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#define MAXNAMELEN 256
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#define MAXPATHLEN 4096
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#define MAXOFFSET_T LLONG_MAX
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#define MAXBSIZE 8192
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#define DEV_BSIZE 512
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define proc_pageout NULL
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#define curproc current
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#define max_ncpus num_possible_cpus()
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#define boot_ncpus num_online_cpus()
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#define CPU_SEQID smp_processor_id()
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#define CPU_SEQID_UNSTABLE raw_smp_processor_id()
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#define is_system_labeled() 0
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#ifndef RLIM64_INFINITY
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#define RLIM64_INFINITY (~0ULL)
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#endif
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/*
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* 0..MAX_PRIO-1: Process priority
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* 0..MAX_RT_PRIO-1: RT priority tasks
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* MAX_RT_PRIO..MAX_PRIO-1: SCHED_NORMAL tasks
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*
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* Treat shim tasks as SCHED_NORMAL tasks
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*/
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#define minclsyspri (MAX_PRIO-1)
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#define maxclsyspri (MAX_RT_PRIO)
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#define defclsyspri (DEFAULT_PRIO)
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#ifndef NICE_TO_PRIO
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#define NICE_TO_PRIO(nice) (MAX_RT_PRIO + (nice) + 20)
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#endif
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#ifndef PRIO_TO_NICE
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#define PRIO_TO_NICE(prio) ((prio) - MAX_RT_PRIO - 20)
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#endif
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/*
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* Missing macros
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*/
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#ifndef PAGESIZE
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#define PAGESIZE PAGE_SIZE
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#endif
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#ifndef PAGESHIFT
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#define PAGESHIFT PAGE_SHIFT
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#endif
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/* Missing globals */
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extern unsigned long spl_hostid;
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/* Missing misc functions */
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extern uint32_t zone_get_hostid(void *zone);
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extern void spl_setup(void);
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extern void spl_cleanup(void);
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/*
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* Only handles the first 4096 majors and first 256 minors. We don't have a
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* libc for the kernel module so we define this inline.
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*/
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static inline dev_t
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makedev(unsigned int major, unsigned int minor)
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{
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return ((major & 0xFFF) << 8) | (minor & 0xFF);
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}
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#define highbit(x) __fls(x)
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#define lowbit(x) __ffs(x)
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#define highbit64(x) fls64(x)
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#define makedevice(maj, min) makedev(maj, min)
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/* common macros */
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#ifndef MIN
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#ifndef MAX
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#define MAX(a, b) ((a) < (b) ? (b) : (a))
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#endif
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#ifndef ABS
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#define ABS(a) ((a) < 0 ? -(a) : (a))
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#endif
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#ifndef DIV_ROUND_UP
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#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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#endif
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#ifndef roundup
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#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
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#endif
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#ifndef howmany
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#define howmany(x, y) (((x) + ((y) - 1)) / (y))
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#endif
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/*
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* Compatibility macros/typedefs needed for Solaris -> Linux port
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*/
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// Deprecated. Use P2ALIGN_TYPED instead.
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// #define P2ALIGN(x, align) ((x) & -(align))
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#define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1)
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#define P2ROUNDUP(x, align) ((((x) - 1) | ((align) - 1)) + 1)
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#define P2PHASE(x, align) ((x) & ((align) - 1))
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#define P2NPHASE(x, align) (-(x) & ((align) - 1))
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#define ISP2(x) (((x) & ((x) - 1)) == 0)
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#define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
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#define P2BOUNDARY(off, len, align) \
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(((off) ^ ((off) + (len) - 1)) > (align) - 1)
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/*
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* Typed version of the P2* macros. These macros should be used to ensure
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* that the result is correctly calculated based on the data type of (x),
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* which is passed in as the last argument, regardless of the data
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* type of the alignment. For example, if (x) is of type uint64_t,
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* and we want to round it up to a page boundary using "PAGESIZE" as
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* the alignment, we can do either
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*
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* P2ROUNDUP(x, (uint64_t)PAGESIZE)
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* or
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* P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
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*/
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#define P2ALIGN_TYPED(x, align, type) \
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((type)(x) & -(type)(align))
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#define P2PHASE_TYPED(x, align, type) \
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((type)(x) & ((type)(align) - 1))
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#define P2NPHASE_TYPED(x, align, type) \
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(-(type)(x) & ((type)(align) - 1))
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#define P2ROUNDUP_TYPED(x, align, type) \
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((((type)(x) - 1) | ((type)(align) - 1)) + 1)
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#define P2END_TYPED(x, align, type) \
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(-(~(type)(x) & -(type)(align)))
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#define P2PHASEUP_TYPED(x, align, phase, type) \
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((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
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#define P2CROSS_TYPED(x, y, align, type) \
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(((type)(x) ^ (type)(y)) > (type)(align) - 1)
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#define P2SAMEHIGHBIT_TYPED(x, y, type) \
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(((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
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#define SET_ERROR(err) \
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(__set_error(__FILE__, __func__, __LINE__, err), err)
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#include <linux/sort.h>
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#define qsort(base, num, size, cmp) \
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sort(base, num, size, cmp, NULL)
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#if !defined(_KMEMUSER) && !defined(offsetof)
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/* avoid any possibility of clashing with <stddef.h> version */
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#define offsetof(s, m) ((size_t)(&(((s *)0)->m)))
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#endif
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#endif /* _SPL_SYSMACROS_H */
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