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msm_rtb: Evaluate parameter only once in reads/writes

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This reverts commit fc44c0ba38 ("msm_rtb: Don't lose
the __user tag on relaxed reads/writes"). This causes
address parameter, with side effects, to be evaluated
more than once.

Change-Id: Ib37665763736bdf562afcc8335b014a2724a7598
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
This commit is contained in:
Neeraj Upadhyay 2020-08-23 16:25:54 +05:30
commit efff3931e0
1 changed files with 6 additions and 4 deletions
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10
include/linux/msm_rtb.h
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@ -69,10 +69,11 @@ int uncached_logk(enum logk_event_type log_type, void *data);
/* Override the #defines in asm/io.h with the logged ones */
#define __raw_read_logged(a, _l, _t) ({ \
_t __a; \
void *_addr = (void *)(a); \
int _ret; \
_ret = uncached_logk(LOGK_READL, (__force void *) a); \
_ret = uncached_logk(LOGK_READL, _addr); \
ETB_WAYPOINT; \
__a = __raw_read##_l(a); \
__a = __raw_read##_l(_addr); \
if (_ret) \
LOG_BARRIER; \
__a; \
@ -135,9 +136,10 @@ int uncached_logk(enum logk_event_type log_type, void *data);
#define __raw_write_logged(v, a, _t) ({ \
int _ret; \
_ret = uncached_logk(LOGK_WRITEL, (__force void *) a); \
void *_addr = (void *)(a); \
_ret = uncached_logk(LOGK_WRITEL, _addr); \
ETB_WAYPOINT; \
__raw_write##_t((v), a); \
__raw_write##_t((v), _addr); \
if (_ret) \
LOG_BARRIER; \
})